fix(versioning,docs): stamp .NET assembly version + worker doc drift (TST-11, WRK-15)

TST-11: single-source the .NET-side version in src/Directory.Build.props so
Server/Worker/Contracts/tests stamp 0.1.2 (was the SDK default 1.0.0) and
InformationalVersion carries the git short SHA (0.1.2+<sha>) for support
correlation; the git query is guarded (ContinueOnError) so a build outside a
git checkout still succeeds. Verified: Server assembly stamps 0.1.2+579282f,
build clean. Kept at 0.1.2 (matches Contracts + aligned Python/Rust/Go
clients); Java leads at 0.2.0 post JDK-17 retarget. Convergence to a single
0.2.0 cadence left as a release decision, not forced here.

WRK-15 (docs-only, no x86 worker build needed): correct the STA thread name in
docs/WorkerSta.md + docs/MxAccessWorkerInstanceDesign.md to the actual
MxGateway.Worker.STA (was the FQ ZB.MOM.WW.MxGateway.Worker.STA), and fix the
stale heartbeat-counter note - CaptureHeartbeat now populates event queue depth
(eventQueue.Count) and sequence (LastEventSequence) from the live queue.

Claude-Session: https://claude.ai/code/session_01DMXXvNuPekkkrTEyPNxEkW

docs/MxAccessWorkerInstanceDesign.md

@@ -251,7 +251,7 @@ The loop should update a heartbeat timestamp after:
 - processing an MXAccess event.
 
 `StaRuntime` implements this runtime boundary in the worker. It starts one
-background thread named `ZB.MOM.WW.MxGateway.Worker.STA`, sets it to `ApartmentState.STA`,
+background thread named `MxGateway.Worker.STA`, sets it to `ApartmentState.STA`,
 initializes COM through `StaComApartmentInitializer`, and runs
 `StaMessagePump`. Commands are scheduled through `InvokeAsync`; the command
 queue signals an `AutoResetEvent` so `MsgWaitForMultipleObjectsEx` can wake the
@@ -650,8 +650,8 @@ Heartbeat payload includes:
 
 `MxAccessStaSession.CaptureHeartbeat()` reads `StaRuntime.LastActivityUtc` and
 `StaCommandDispatcher` queue state without touching the raw MXAccess COM object
-outside the STA. Event queue depth and event sequence are reported as zero until
+outside the STA. Event queue depth (`eventQueue.Count`) and event sequence
-the event queue implementation owns those counters.
+(`eventQueue.LastEventSequence`) are populated from the live event queue.
 
 The STA watchdog currently emits a `WorkerFault` with
 `WorkerFaultCategory.StaHung` when `LastStaActivityUtc` is older than

docs/WorkerSta.md

@@ -20,13 +20,13 @@ The installed MXAccess interop assembly declares an `Apartment` threading model
 
 ## STA Thread Initialization
 
-`StaRuntime`'s constructor configures a background `Thread` named `ZB.MOM.WW.MxGateway.Worker.STA` and forces it into `ApartmentState.STA` before the thread starts. `Start()` releases the thread and then blocks on `startedEvent` so callers observe a fully-initialized apartment (or a captured `startupException`) before the first `InvokeAsync` call:
+`StaRuntime`'s constructor configures a background `Thread` named `MxGateway.Worker.STA` and forces it into `ApartmentState.STA` before the thread starts. `Start()` releases the thread and then blocks on `startedEvent` so callers observe a fully-initialized apartment (or a captured `startupException`) before the first `InvokeAsync` call:
 
 ```csharp
 staThread = new Thread(ThreadMain)
 {
     IsBackground = true,
-    Name = "ZB.MOM.WW.MxGateway.Worker.STA"
+    Name = "MxGateway.Worker.STA"
 };
 staThread.SetApartmentState(ApartmentState.STA);
 ```

src/Directory.Build.props

@@ -9,6 +9,31 @@
     <Deterministic>true</Deterministic>
   </PropertyGroup>
 
+  <!-- TST-11: single-source the .NET-side version for Server, Worker, Contracts, and tests
+       (they otherwise stamp the SDK default 1.0.0, so a deployed gateway cannot be correlated
+       to a release). Kept at 0.1.2 to match the Contracts package and the aligned Python/Rust/
+       Go clients; the Java client leads at 0.2.0 after its JDK-17 retarget. The git short SHA is
+       appended to InformationalVersion (0.1.2+<sha>) so support can map a running binary to a
+       commit; the query is guarded so a build outside a git checkout still succeeds. -->
+  <PropertyGroup>
+    <Version>0.1.2</Version>
+  </PropertyGroup>
+
+  <Target Name="StampSourceRevision"
+          BeforeTargets="GetAssemblyVersion;GenerateAssemblyInfo"
+          Condition="'$(SourceRevisionId)' == ''">
+    <Exec Command="git -C &quot;$(MSBuildThisFileDirectory)&quot; rev-parse --short HEAD"
+          ConsoleToMSBuild="true"
+          StandardOutputImportance="Low"
+          ContinueOnError="true"
+          IgnoreExitCode="true">
+      <Output TaskParameter="ConsoleOutput" PropertyName="_StampedGitSha" />
+    </Exec>
+    <PropertyGroup>
+      <SourceRevisionId Condition="'$(_StampedGitSha)' != ''">$(_StampedGitSha.Trim())</SourceRevisionId>
+    </PropertyGroup>
+  </Target>
+
   <!-- SQLitePCLRaw.lib.e_sqlite3 2.1.11 (transitive via Microsoft.Data.Sqlite) carries GHSA-2m69-gcr7-jv3q,
        which surfaces as NU1903 (warning-as-error). No patched e_sqlite3 release exists yet (2.1.11 is latest),
        so this targeted suppression keeps every OTHER transitive package audited. Remove once an upstream fix ships. -->