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/tests/ZB.MOM.WW.LmxProxy.Host.Tests/MxAccess/StaDispatchThreadTests.cs

@@ -1,86 +0,0 @@
-using System;
-using System.Threading;
-using System.Threading.Tasks;
-using FluentAssertions;
-using Xunit;
-using ZB.MOM.WW.LmxProxy.Host.MxAccess;
-
-namespace ZB.MOM.WW.LmxProxy.Host.Tests.MxAccess
-{
-    public class StaDispatchThreadTests
-    {
-        [Fact]
-        public async Task DispatchAsync_ExecutesOnStaThread()
-        {
-            using var sta = new StaDispatchThread("Test-STA");
-            var threadId = await sta.DispatchAsync(() => Thread.CurrentThread.ManagedThreadId);
-            threadId.Should().NotBe(Thread.CurrentThread.ManagedThreadId);
-        }
-
-        [Fact]
-        public async Task DispatchAsync_ReturnsResult()
-        {
-            using var sta = new StaDispatchThread("Test-STA");
-            var result = await sta.DispatchAsync(() => 42);
-            result.Should().Be(42);
-        }
-
-        [Fact]
-        public async Task DispatchAsync_PropagatesException()
-        {
-            using var sta = new StaDispatchThread("Test-STA");
-            Func<Task> act = () => sta.DispatchAsync<int>(() => throw new InvalidOperationException("test error"));
-            await act.Should().ThrowAsync<InvalidOperationException>().WithMessage("test error");
-        }
-
-        [Fact]
-        public async Task DispatchAsync_Action_Completes()
-        {
-            using var sta = new StaDispatchThread("Test-STA");
-            int value = 0;
-            await sta.DispatchAsync(() => { value = 99; });
-            value.Should().Be(99);
-        }
-
-        [Fact]
-        public void Dispose_CompletesGracefully()
-        {
-            var sta = new StaDispatchThread("Test-STA");
-            sta.Dispose(); // Should not throw
-        }
-
-        [Fact]
-        public void DispatchAfterDispose_ThrowsObjectDisposedException()
-        {
-            var sta = new StaDispatchThread("Test-STA");
-            sta.Dispose();
-            Func<Task> act = () => sta.DispatchAsync(() => 42);
-            act.Should().ThrowAsync<ObjectDisposedException>();
-        }
-
-        [Fact]
-        public async Task MultipleDispatches_ExecuteInOrder()
-        {
-            using var sta = new StaDispatchThread("Test-STA");
-            var results = new System.Collections.Concurrent.ConcurrentBag<int>();
-
-            var tasks = new Task[10];
-            for (int i = 0; i < 10; i++)
-            {
-                int idx = i;
-                tasks[i] = sta.DispatchAsync(() => { results.Add(idx); });
-            }
-
-            await Task.WhenAll(tasks);
-            results.Count.Should().Be(10);
-        }
-
-        [Fact]
-        public async Task StaThread_HasStaApartmentState()
-        {
-            using var sta = new StaDispatchThread("Test-STA");
-            var apartmentState = await sta.DispatchAsync(() => Thread.CurrentThread.GetApartmentState());
-            apartmentState.Should().Be(ApartmentState.STA);
-        }
-    }
-}