rename: apply ZB.MOM.WW prefix to all client SDKs + fix pre-existing alarm-RPC breaks

Rename across every client surface using each language's idiomatic convention:

  * .NET   clients/dotnet/MxGateway.Client[.Cli|.Tests]/
             -> clients/dotnet/ZB.MOM.WW.MxGateway.Client[.Cli|.Tests]/
             namespaces -> ZB.MOM.WW.MxGateway.Client[.Cli|.Tests]
             contracts ProjectReference repointed to ZB.MOM.WW.MxGateway.Contracts
             sln migrated to slnx (dotnet sln migrate)
  * Python src/mxgateway -> src/zb_mom_ww_mxgateway
             src/mxgateway_cli -> src/zb_mom_ww_mxgateway_cli
             distribution: mxaccess-gateway-client -> zb-mom-ww-mxaccess-gateway-client
  * Rust   crate: mxgateway-client -> zb-mom-ww-mxgateway-client
             build.rs proto path repointed
  * Java   subprojects: mxgateway-{client,cli} -> zb-mom-ww-mxgateway-{client,cli}
             packages com.dohertylan.mxgateway -> com.zb.mom.ww.mxgateway
             group   com.dohertylan.mxgateway -> com.zb.mom.ww.mxgateway
             rootProject mxaccessgw-java -> zb-mom-ww-mxaccessgw-java
  * Go     generate-proto.ps1 proto path repointed; module path and
             package mxgateway kept (Go convention).
  * proto-inputs.json: generatedOutputs.python updated to new package path.
  * scripts/run-client-e2e-tests.ps1: Java CLI install path + gradle task
             updated to zb-mom-ww-mxgateway-cli.

CLI binary names (mxgw, mxgw-py, mxgw-go, mxgateway-cli) and wire-level
identifiers (MXGATEWAY_* env vars, the mxgw_<id>_<secret> API key
prefix, protobuf package names like mxaccess_gateway.v1, all MXAccess
references) intentionally NOT renamed.

Fix pre-existing alarms-over-gateway breaks unblocked by the rename:

  * mxaccess_gateway.proto: add missing public message QueryActiveAlarmsRequest
    {session_id, client_correlation_id, alarm_filter_prefix} and missing
    rpc QueryActiveAlarms(QueryActiveAlarmsRequest) returns
    (stream ActiveAlarmSnapshot). All four typed clients referenced
    these but they were absent from the proto.
  * MxAccessGatewayService.QueryActiveAlarms: implement the new RPC on
    the server, streaming from IGatewayAlarmService.CurrentAlarms with
    optional alarm_filter_prefix filter.
  * clients/dotnet/.../DiscoverHierarchyOptions.cs: add the hand-written
    .NET POCO that wraps DiscoverHierarchyRequest (referenced by
    GalaxyRepositoryClient.DiscoverHierarchyAsync but never authored).
  * Drop retired session_id field references from
    AcknowledgeAlarmRequest/AcknowledgeAlarmReply test fixtures across
    .NET, Rust, Go, and Python clients.
  * Rust integration test: add the missing stream_alarms impl on the
    fake MxAccessGateway server (the trait gained the method, fake
    didn't).
  * Rust CLI test: bump expected gatewayProtocolVersion 2 -> 3.

Regenerated artifacts updated in this commit:
  * src/ZB.MOM.WW.MxGateway.Contracts/Generated/{MxaccessGateway,MxaccessGatewayGrpc}.cs
  * clients/python/src/zb_mom_ww_mxgateway/generated/*_pb2{,_grpc}.py
  * clients/go/internal/generated/*.pb.go
(C# regenerated by Grpc.Tools on contracts build; Python and Go via
their generate-proto.ps1 scripts; Rust regenerates from .proto via
tonic-build at compile time so no checked-in artefact.)

Verification: 472 server tests, 275 worker tests (9 dev-rig skipped),
18 integration tests (live MxAccess + LDAP + Galaxy), 57 .NET client
tests, 32 Rust workspace tests, 39 Python tests, all Go packages, and
gradle build for Java all pass.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

clients/dotnet/ZB.MOM.WW.MxGateway.Client/GalaxyRepositoryClient.cs

@@ -0,0 +1,449 @@
+using Google.Protobuf.WellKnownTypes;
+using Grpc.Core;
+using Grpc.Net.Client;
+using Microsoft.Extensions.Logging;
+using ZB.MOM.WW.MxGateway.Contracts.Proto.Galaxy;
+using Polly;
+using System.Net.Http;
+using System.Net.Security;
+using System.Runtime.CompilerServices;
+using System.Security.Cryptography.X509Certificates;
+
+namespace ZB.MOM.WW.MxGateway.Client;
+
+/// <summary>
+/// Provides the .NET client entry point for the public Galaxy Repository gRPC API.
+/// All RPCs are read-only metadata calls that share the gateway's API-key auth
+/// interceptor and require the <c>metadata:read</c> scope server-side.
+/// </summary>
+public sealed class GalaxyRepositoryClient : IAsyncDisposable
+{
+    private const int DiscoverHierarchyPageSize = 5000;
+
+    private readonly GrpcChannel? _channel;
+    private readonly IGalaxyRepositoryClientTransport _transport;
+    private readonly ResiliencePipeline _safeUnaryRetryPipeline;
+    private bool _disposed;
+
+    /// <summary>
+    /// Initializes a Galaxy Repository client with custom transport and options.
+    /// </summary>
+    /// <param name="options">Client options.</param>
+    /// <param name="transport">The underlying gRPC transport.</param>
+    internal GalaxyRepositoryClient(
+        MxGatewayClientOptions options,
+        IGalaxyRepositoryClientTransport transport)
+    {
+        ArgumentNullException.ThrowIfNull(options);
+        options.Validate();
+
+        Options = options;
+        _transport = transport ?? throw new ArgumentNullException(nameof(transport));
+        _safeUnaryRetryPipeline = MxGatewayClientRetryPolicy.Create(
+            options.Retry,
+            options.LoggerFactory?.CreateLogger<GalaxyRepositoryClient>());
+        _channel = null;
+    }
+
+    private GalaxyRepositoryClient(
+        GrpcChannel channel,
+        IGalaxyRepositoryClientTransport transport)
+    {
+        _channel = channel;
+        _transport = transport;
+        Options = transport.Options;
+        _safeUnaryRetryPipeline = MxGatewayClientRetryPolicy.Create(
+            Options.Retry,
+            Options.LoggerFactory?.CreateLogger<GalaxyRepositoryClient>());
+    }
+
+    /// <summary>
+    /// Client options used to configure timeouts, authentication, and retry policy.
+    /// </summary>
+    public MxGatewayClientOptions Options { get; }
+
+    /// <summary>
+    /// The underlying generated gRPC client for advanced operations.
+    /// </summary>
+    public GalaxyRepository.GalaxyRepositoryClient RawClient =>
+        _transport.RawClient
+        ?? throw new InvalidOperationException("The raw generated gRPC client is not available for this client instance.");
+
+    /// <summary>
+    /// Creates a Galaxy Repository client with the given options, establishing a new gRPC channel.
+    /// </summary>
+    /// <param name="options">Client options.</param>
+    /// <returns>A new client instance.</returns>
+    public static GalaxyRepositoryClient Create(MxGatewayClientOptions options)
+    {
+        ArgumentNullException.ThrowIfNull(options);
+        options.Validate();
+
+        HttpMessageHandler handler = CreateHttpHandler(options);
+        var channel = GrpcChannel.ForAddress(
+            options.Endpoint,
+            new GrpcChannelOptions
+            {
+                HttpHandler = handler,
+                LoggerFactory = options.LoggerFactory,
+                MaxReceiveMessageSize = options.MaxGrpcMessageBytes,
+                MaxSendMessageSize = options.MaxGrpcMessageBytes,
+            });
+
+        return new GalaxyRepositoryClient(
+            channel,
+            new GrpcGalaxyRepositoryClientTransport(
+                options,
+                new GalaxyRepository.GalaxyRepositoryClient(channel)));
+    }
+
+    /// <summary>
+    /// Probes the Galaxy Repository database connection. Returns true when the
+    /// gateway can reach the configured ZB SQL Server.
+    /// </summary>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>True if connection is successful, false otherwise.</returns>
+    public async Task<bool> TestConnectionAsync(CancellationToken cancellationToken = default)
+    {
+        TestConnectionReply reply = await TestConnectionRawAsync(
+                new TestConnectionRequest(),
+                cancellationToken)
+            .ConfigureAwait(false);
+
+        return reply.Ok;
+    }
+
+    /// <summary>
+    /// Probes the Galaxy Repository database connection without result wrapping.
+    /// </summary>
+    /// <param name="request">The test connection request.</param>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>The raw server reply.</returns>
+    public Task<TestConnectionReply> TestConnectionRawAsync(
+        TestConnectionRequest request,
+        CancellationToken cancellationToken = default)
+    {
+        ArgumentNullException.ThrowIfNull(request);
+        ThrowIfDisposed();
+
+        return ExecuteSafeUnaryAsync(
+            token => _transport.TestConnectionAsync(request, CreateCallOptions(token)),
+            cancellationToken);
+    }
+
+    /// <summary>
+    /// Returns the timestamp of the most recent Galaxy deployment, or
+    /// <see langword="null"/> when no deployment has been recorded.
+    /// </summary>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>The deployment timestamp, or null if not recorded.</returns>
+    public async Task<DateTime?> GetLastDeployTimeAsync(CancellationToken cancellationToken = default)
+    {
+        GetLastDeployTimeReply reply = await GetLastDeployTimeRawAsync(
+                new GetLastDeployTimeRequest(),
+                cancellationToken)
+            .ConfigureAwait(false);
+
+        if (!reply.Present || reply.TimeOfLastDeploy is null)
+        {
+            return null;
+        }
+
+        return reply.TimeOfLastDeploy.ToDateTime();
+    }
+
+    /// <summary>
+    /// Returns the most recent Galaxy deployment timestamp without result wrapping.
+    /// </summary>
+    /// <param name="request">The last deploy-time request.</param>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>The raw server reply.</returns>
+    public Task<GetLastDeployTimeReply> GetLastDeployTimeRawAsync(
+        GetLastDeployTimeRequest request,
+        CancellationToken cancellationToken = default)
+    {
+        ArgumentNullException.ThrowIfNull(request);
+        ThrowIfDisposed();
+
+        return ExecuteSafeUnaryAsync(
+            token => _transport.GetLastDeployTimeAsync(request, CreateCallOptions(token)),
+            cancellationToken);
+    }
+
+    /// <summary>
+    /// Enumerates the deployed Galaxy object hierarchy. Each <see cref="GalaxyObject"/>
+    /// includes its dynamic attributes so callers can determine which tag references
+    /// they may subscribe to via the MxAccessGateway service.
+    /// </summary>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>The collection of Galaxy objects in the hierarchy.</returns>
+    public async Task<IReadOnlyList<GalaxyObject>> DiscoverHierarchyAsync(CancellationToken cancellationToken = default)
+    {
+        return await DiscoverHierarchyAsync(new DiscoverHierarchyOptions(), cancellationToken).ConfigureAwait(false);
+    }
+
+    public async Task<IReadOnlyList<GalaxyObject>> DiscoverHierarchyAsync(
+        DiscoverHierarchyOptions options,
+        CancellationToken cancellationToken = default)
+    {
+        List<GalaxyObject> objects = [];
+        HashSet<string> seenPageTokens = new(StringComparer.Ordinal);
+        string pageToken = string.Empty;
+        do
+        {
+            DiscoverHierarchyRequest request = CreateDiscoverHierarchyRequest(options);
+            request.PageSize = DiscoverHierarchyPageSize;
+            request.PageToken = pageToken;
+            DiscoverHierarchyReply reply = await DiscoverHierarchyRawAsync(
+                    request,
+                    cancellationToken)
+                .ConfigureAwait(false);
+
+            objects.AddRange(reply.Objects);
+            pageToken = reply.NextPageToken;
+            if (!string.IsNullOrWhiteSpace(pageToken)
+                && !seenPageTokens.Add(pageToken))
+            {
+                throw new MxGatewayException(
+                    $"Galaxy DiscoverHierarchy returned a repeated page token '{pageToken}'.");
+            }
+        }
+        while (!string.IsNullOrWhiteSpace(pageToken));
+
+        return objects;
+    }
+
+    private static DiscoverHierarchyRequest CreateDiscoverHierarchyRequest(DiscoverHierarchyOptions options)
+    {
+        ArgumentNullException.ThrowIfNull(options);
+
+        DiscoverHierarchyRequest request = new()
+        {
+            AlarmBearingOnly = options.AlarmBearingOnly,
+            HistorizedOnly = options.HistorizedOnly,
+        };
+
+        if (options.RootGobjectId.HasValue)
+        {
+            request.RootGobjectId = options.RootGobjectId.Value;
+        }
+        else if (!string.IsNullOrWhiteSpace(options.RootTagName))
+        {
+            request.RootTagName = options.RootTagName;
+        }
+        else if (!string.IsNullOrWhiteSpace(options.RootContainedPath))
+        {
+            request.RootContainedPath = options.RootContainedPath;
+        }
+
+        if (options.MaxDepth.HasValue)
+        {
+            request.MaxDepth = options.MaxDepth.Value;
+        }
+
+        request.CategoryIds.Add(options.CategoryIds);
+        request.TemplateChainContains.Add(options.TemplateChainContains);
+        if (!string.IsNullOrWhiteSpace(options.TagNameGlob))
+        {
+            request.TagNameGlob = options.TagNameGlob;
+        }
+
+        if (options.IncludeAttributes.HasValue)
+        {
+            request.IncludeAttributes = options.IncludeAttributes.Value;
+        }
+
+        return request;
+    }
+
+    /// <summary>
+    /// Enumerates the Galaxy object hierarchy without result wrapping.
+    /// </summary>
+    /// <param name="request">The discover-hierarchy request.</param>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>The raw server reply.</returns>
+    public Task<DiscoverHierarchyReply> DiscoverHierarchyRawAsync(
+        DiscoverHierarchyRequest request,
+        CancellationToken cancellationToken = default)
+    {
+        ArgumentNullException.ThrowIfNull(request);
+        ThrowIfDisposed();
+
+        return ExecuteSafeUnaryAsync(
+            token => _transport.DiscoverHierarchyAsync(request, CreateCallOptions(token)),
+            cancellationToken);
+    }
+
+    /// <summary>
+    /// Subscribes to Galaxy deploy events. The server emits a bootstrap event with the
+    /// current state on subscribe so callers can prime their cache, then emits one event
+    /// per new <c>time_of_last_deploy</c>. Pass <paramref name="lastSeenDeployTime"/> to
+    /// suppress the bootstrap when the caller already holds the current deploy time.
+    /// </summary>
+    /// <remarks>
+    /// Streaming RPCs are not wrapped by the unary safe-read retry pipeline. If the
+    /// stream is interrupted the caller must reopen it; the server does not guarantee
+    /// at-least-once delivery beyond the per-subscriber buffer (gaps in
+    /// <see cref="DeployEvent.Sequence"/> indicate dropped events).
+    /// </remarks>
+    /// <param name="lastSeenDeployTime">Optional timestamp to suppress the bootstrap event.</param>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>An async enumerable of deploy events.</returns>
+    public IAsyncEnumerable<DeployEvent> WatchDeployEventsAsync(
+        DateTimeOffset? lastSeenDeployTime = null,
+        CancellationToken cancellationToken = default)
+    {
+        ThrowIfDisposed();
+
+        WatchDeployEventsRequest request = new();
+        if (lastSeenDeployTime is { } seen)
+        {
+            request.LastSeenDeployTime = Timestamp.FromDateTimeOffset(seen);
+        }
+
+        return WatchDeployEventsRawAsync(request, cancellationToken);
+    }
+
+    /// <summary>
+    /// Subscribes to Galaxy deploy events without result wrapping.
+    /// </summary>
+    /// <param name="request">The watch-deploy-events request.</param>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>An async enumerable of raw deploy events.</returns>
+    public IAsyncEnumerable<DeployEvent> WatchDeployEventsRawAsync(
+        WatchDeployEventsRequest request,
+        CancellationToken cancellationToken = default)
+    {
+        ArgumentNullException.ThrowIfNull(request);
+        ThrowIfDisposed();
+
+        return WatchDeployEventsCoreAsync(request, cancellationToken);
+    }
+
+    private async IAsyncEnumerable<DeployEvent> WatchDeployEventsCoreAsync(
+        WatchDeployEventsRequest request,
+        [EnumeratorCancellation] CancellationToken cancellationToken)
+    {
+        await foreach (DeployEvent deployEvent in _transport
+            .WatchDeployEventsAsync(request, CreateStreamCallOptions(cancellationToken))
+            .WithCancellation(cancellationToken)
+            .ConfigureAwait(false))
+        {
+            yield return deployEvent;
+        }
+    }
+
+    /// <summary>
+    /// Closes the gRPC channel and releases resources.
+    /// </summary>
+    public ValueTask DisposeAsync()
+    {
+        if (_disposed)
+        {
+            return ValueTask.CompletedTask;
+        }
+
+        _disposed = true;
+        _channel?.Dispose();
+        return ValueTask.CompletedTask;
+    }
+
+    /// <summary>
+    /// Creates gRPC call options with the client's default timeout and API-key authorization.
+    /// </summary>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>The call options.</returns>
+    internal CallOptions CreateCallOptions(CancellationToken cancellationToken)
+    {
+        return CreateCallOptions(cancellationToken, Options.DefaultCallTimeout);
+    }
+
+    /// <summary>
+    /// Creates gRPC call options for streaming RPCs with the stream timeout and API-key authorization.
+    /// </summary>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>The stream call options.</returns>
+    internal CallOptions CreateStreamCallOptions(CancellationToken cancellationToken)
+    {
+        return CreateCallOptions(cancellationToken, Options.StreamTimeout);
+    }
+
+    /// <summary>
+    /// Creates gRPC call options with the specified timeout and API-key authorization.
+    /// </summary>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <param name="timeout">Optional timeout duration.</param>
+    /// <returns>The call options.</returns>
+    internal CallOptions CreateCallOptions(
+        CancellationToken cancellationToken,
+        TimeSpan? timeout)
+    {
+        Metadata headers = new()
+        {
+            { "authorization", $"Bearer {Options.ApiKey}" },
+        };
+
+        return new CallOptions(
+            headers,
+            timeout is null ? null : DateTime.UtcNow.Add(timeout.Value),
+            cancellationToken);
+    }
+
+    private async Task<T> ExecuteSafeUnaryAsync<T>(
+        Func<CancellationToken, Task<T>> call,
+        CancellationToken cancellationToken)
+    {
+        using CancellationTokenSource timeout = CancellationTokenSource.CreateLinkedTokenSource(cancellationToken);
+        timeout.CancelAfter(Options.DefaultCallTimeout);
+
+        return await _safeUnaryRetryPipeline.ExecuteAsync(
+                async token => await call(token).ConfigureAwait(false),
+                timeout.Token)
+            .ConfigureAwait(false);
+    }
+
+    private static HttpMessageHandler CreateHttpHandler(MxGatewayClientOptions options)
+    {
+        SocketsHttpHandler handler = new()
+        {
+            ConnectTimeout = options.ConnectTimeout,
+        };
+
+        if (options.UseTls)
+        {
+            handler.SslOptions = new SslClientAuthenticationOptions();
+            if (!string.IsNullOrWhiteSpace(options.ServerNameOverride))
+            {
+                handler.SslOptions.TargetHost = options.ServerNameOverride;
+            }
+
+            if (!string.IsNullOrWhiteSpace(options.CaCertificatePath))
+            {
+                X509Certificate2 trustedRoot = X509CertificateLoader.LoadCertificateFromFile(options.CaCertificatePath);
+                handler.SslOptions.RemoteCertificateValidationCallback = (_, certificate, chain, errors) =>
+                {
+                    if (certificate is null)
+                    {
+                        return false;
+                    }
+
+                    using X509Chain customChain = new();
+                    customChain.ChainPolicy.TrustMode = X509ChainTrustMode.CustomRootTrust;
+                    customChain.ChainPolicy.CustomTrustStore.Add(trustedRoot);
+                    customChain.ChainPolicy.RevocationMode = X509RevocationMode.NoCheck;
+                    customChain.ChainPolicy.VerificationFlags = X509VerificationFlags.NoFlag;
+                    X509Certificate2 certificateToValidate = certificate as X509Certificate2
+                        ?? X509CertificateLoader.LoadCertificate(certificate.Export(X509ContentType.Cert));
+                    return customChain.Build(certificateToValidate);
+                };
+            }
+        }
+
+        return handler;
+    }
+
+    private void ThrowIfDisposed()
+    {
+        ObjectDisposedException.ThrowIf(_disposed, this);
+    }
+}