chore: organize solution into module folders (Core/Server/Drivers/Client/Tooling)

Group all 69 projects into category subfolders under src/ and tests/ so the
Rider Solution Explorer mirrors the module structure. Folders: Core, Server,
Drivers (with a nested Driver CLIs subfolder), Client, Tooling.

- Move every project folder on disk with git mv (history preserved as renames).
- Recompute relative paths in 57 .csproj files: cross-category ProjectReferences,
  the lib/ HintPath+None refs in Driver.Historian.Wonderware, and the external
  mxaccessgw refs in Driver.Galaxy and its test project.
- Rebuild ZB.MOM.WW.OtOpcUa.slnx with nested solution folders.
- Re-prefix project paths in functional scripts (e2e, compliance, smoke SQL,
  integration, install).

Build green (0 errors); unit tests pass. Docs left for a separate pass.

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

src/Server/ZB.MOM.WW.OtOpcUa.Server/SealedBootstrap.cs

@@ -0,0 +1,100 @@
+using System.Text.Json;
+using Microsoft.Data.SqlClient;
+using Microsoft.Extensions.Logging;
+using ZB.MOM.WW.OtOpcUa.Configuration.LocalCache;
+
+namespace ZB.MOM.WW.OtOpcUa.Server;
+
+/// <summary>
+///     Phase 6.1 Stream D consumption hook — bootstraps the node's current generation through
+///     the <see cref="ResilientConfigReader"/> pipeline + writes every successful central-DB
+///     read into the <see cref="GenerationSealedCache"/> so the next cache-miss path has a
+///     sealed snapshot to fall back to.
+/// </summary>
+/// <remarks>
+///     <para>Alongside the original <see cref="NodeBootstrap"/> (which uses the single-file
+///     <see cref="ILocalConfigCache"/>). Program.cs can switch to this one once operators are
+///     ready for the generation-sealed semantics. The original stays for backward compat
+///     with the three integration tests that construct <see cref="NodeBootstrap"/> directly.</para>
+///
+///     <para>Closes release blocker #2 in <c>docs/v2/v2-release-readiness.md</c> — the
+///     generation-sealed cache + resilient reader + stale-config flag ship as unit-tested
+///     primitives in PR #81 but no production path consumed them until this wrapper.</para>
+/// </remarks>
+public sealed class SealedBootstrap
+{
+    private readonly NodeOptions _options;
+    private readonly GenerationSealedCache _cache;
+    private readonly ResilientConfigReader _reader;
+    private readonly StaleConfigFlag _staleFlag;
+    private readonly ILogger<SealedBootstrap> _logger;
+
+    public SealedBootstrap(
+        NodeOptions options,
+        GenerationSealedCache cache,
+        ResilientConfigReader reader,
+        StaleConfigFlag staleFlag,
+        ILogger<SealedBootstrap> logger)
+    {
+        _options = options;
+        _cache = cache;
+        _reader = reader;
+        _staleFlag = staleFlag;
+        _logger = logger;
+    }
+
+    /// <summary>
+    ///     Resolve the current generation for this node. Routes the central-DB fetch through
+    ///     <see cref="ResilientConfigReader"/> (timeout → retry → fallback-to-cache) + seals a
+    ///     fresh snapshot on every successful DB read so a future cache-miss has something to
+    ///     serve.
+    /// </summary>
+    public async Task<BootstrapResult> LoadCurrentGenerationAsync(CancellationToken ct)
+    {
+        return await _reader.ReadAsync(
+            _options.ClusterId,
+            centralFetch: async innerCt => await FetchFromCentralAsync(innerCt).ConfigureAwait(false),
+            fromSnapshot: snap => BootstrapResult.FromCache(snap.GenerationId),
+            ct).ConfigureAwait(false);
+    }
+
+    private async ValueTask<BootstrapResult> FetchFromCentralAsync(CancellationToken ct)
+    {
+        await using var conn = new SqlConnection(_options.ConfigDbConnectionString);
+        await conn.OpenAsync(ct).ConfigureAwait(false);
+
+        await using var cmd = conn.CreateCommand();
+        cmd.CommandText = "EXEC dbo.sp_GetCurrentGenerationForCluster @NodeId=@n, @ClusterId=@c";
+        cmd.Parameters.AddWithValue("@n", _options.NodeId);
+        cmd.Parameters.AddWithValue("@c", _options.ClusterId);
+
+        await using var reader = await cmd.ExecuteReaderAsync(ct).ConfigureAwait(false);
+        if (!await reader.ReadAsync(ct).ConfigureAwait(false))
+        {
+            _logger.LogWarning("Cluster {Cluster} has no Published generation yet", _options.ClusterId);
+            return BootstrapResult.EmptyFromDb();
+        }
+
+        var generationId = reader.GetInt64(0);
+        _logger.LogInformation("Bootstrapped from central DB: generation {GenerationId}; sealing snapshot", generationId);
+
+        // Seal a minimal snapshot with the generation pointer. A richer snapshot that carries
+        // the full sp_GetGenerationContent payload lands when the bootstrap flow grows to
+        // consume the content during offline operation (separate follow-up — see decision #148
+        // and phase-6-1 Stream D.3). The pointer alone is enough for the fallback path to
+        // surface the last-known-good generation id + flip UsingStaleConfig.
+        await _cache.SealAsync(new GenerationSnapshot
+        {
+            ClusterId = _options.ClusterId,
+            GenerationId = generationId,
+            CachedAt = DateTime.UtcNow,
+            PayloadJson = JsonSerializer.Serialize(new { generationId, source = "sp_GetCurrentGenerationForCluster" }),
+        }, ct).ConfigureAwait(false);
+
+        // StaleConfigFlag bookkeeping: ResilientConfigReader.MarkFresh on the returning call
+        // path; we're on the fresh branch so we don't touch the flag here.
+        _ = _staleFlag; // held so the field isn't flagged unused
+
+        return BootstrapResult.FromDb(generationId);
+    }
+}