feat(lmxproxy): phase 7 — integration tests, deployment to windev, v1 cutover

- Replaced STA dispatch thread with Task.Run pattern for COM interop
- Fixed TypedValue oneof tracking with property-level _setCase field
- Added x-api-key DelegatingHandler for gRPC metadata authentication
- Fixed CheckApiKey RPC to validate request body key (not header)
- Integration tests: 15/17 pass (reads, subscribes, API keys, connections)
- 2 write tests pending (OnWriteComplete callback timing issue)
- v2 service deployed on windev port 50100

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

lmxproxy/src/ZB.MOM.WW.LmxProxy.Host/ZB.MOM.WW.LmxProxy.Host.csproj

@@ -46,7 +46,6 @@
       <HintPath>..\..\lib\ArchestrA.MXAccess.dll</HintPath>
       <Private>true</Private>
     </Reference>
-    <Reference Include="System.Windows.Forms" />
   </ItemGroup>
 
   <ItemGroup>