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/python/tests/test_alarms.py

@@ -8,9 +8,9 @@ from typing import Any
 import grpc
 import pytest
 
-from mxgateway import ClientOptions, GatewayClient
-from mxgateway.errors import MxGatewayAuthenticationError, MxGatewayAuthorizationError
-from mxgateway.generated import mxaccess_gateway_pb2 as pb
+from zb_mom_ww_mxgateway import ClientOptions, GatewayClient
+from zb_mom_ww_mxgateway.errors import MxGatewayAuthenticationError, MxGatewayAuthorizationError
+from zb_mom_ww_mxgateway.generated import mxaccess_gateway_pb2 as pb
 
 
 @pytest.mark.asyncio
@@ -18,7 +18,6 @@ async def test_acknowledge_alarm_sends_request_and_returns_reply() -> None:
     stub = FakeGatewayStub()
     stub.acknowledge_alarm.replies = [
         pb.AcknowledgeAlarmReply(
-            session_id="session-1",
             correlation_id="corr-7",
             protocol_status=pb.ProtocolStatus(code=pb.PROTOCOL_STATUS_CODE_OK),
             status=pb.MxStatusProxy(success=1, category=pb.MX_STATUS_CATEGORY_OK),
@@ -31,7 +30,6 @@ async def test_acknowledge_alarm_sends_request_and_returns_reply() -> None:
 
     reply = await client.acknowledge_alarm(
         pb.AcknowledgeAlarmRequest(
-            session_id="session-1",
             client_correlation_id="corr-7",
             alarm_full_reference="Tank01.Level.HiHi",
             comment="investigating",
@@ -61,7 +59,6 @@ async def test_acknowledge_alarm_unauthenticated_raises_typed_error() -> None:
     with pytest.raises(MxGatewayAuthenticationError):
         await client.acknowledge_alarm(
             pb.AcknowledgeAlarmRequest(
-                session_id="session-1",
                 alarm_full_reference="Tank01.Level.HiHi",
                 comment="",
                 operator_user="alice",
@@ -81,7 +78,6 @@ async def test_acknowledge_alarm_permission_denied_raises_typed_error() -> None:
     with pytest.raises(MxGatewayAuthorizationError):
         await client.acknowledge_alarm(
             pb.AcknowledgeAlarmRequest(
-                session_id="session-1",
                 alarm_full_reference="Tank01.Level.HiHi",
                 comment="",
                 operator_user="alice",