docs: strip task-tracking IDs from code comments and fill missing XML docs

Tracking IDs are review bookkeeping that rots in shipped source; the rationale they tagged is kept. Comment-only change (CommentChecker 458 -> 16 false positives).

src/ZB.MOM.WW.MxGateway.Tests/Gateway/Sessions/GatewaySessionTests.cs

@@ -669,7 +669,7 @@ public sealed class GatewaySessionTests
     }
 
     /// <summary>
-    ///     GWC-27: <see cref="GatewaySession.AttachInternalEventSubscriber"/> must refuse to
+    ///     <see cref="GatewaySession.AttachInternalEventSubscriber"/> must refuse to
     ///     attach before the session is Ready. Without the gate the attach would construct and
     ///     start the distributor against a not-yet-Ready worker; the pump source throws
     ///     <c>SessionNotReady</c>, every subscriber is completed with that error, and the
@@ -720,7 +720,7 @@ public sealed class GatewaySessionTests
     }
 
     /// <summary>
-    ///     GWC-34, the disposal-side twin of the GWC-27 premature-attach poison: an attach that
+    ///     The disposal-side twin of the premature-attach poison: an attach that
     ///     passed its readiness gate and then lost the CPU until the session was torn down used to
     ///     find <c>_eventDistributor</c> null, read that as "not created yet" and build a
     ///     REPLACEMENT distributor. Its pump could never start (the started flag is a one-way latch)

src/ZB.MOM.WW.MxGateway.Tests/Gateway/Sessions/SessionEventDistributorTests.cs

@@ -843,7 +843,7 @@ public sealed class SessionEventDistributorTests
     }
 
     /// <summary>
-    ///     GWC-25: when age eviction has emptied the replay ring, a resume behind the highest
+    ///     When age eviction has emptied the replay ring, a resume behind the highest
     ///     observed sequence still reports a gap, and the reported oldest-available sequence is
     ///     the next sequence that can possibly be delivered (highest seen + 1) — never <c>0</c>,
     ///     which would make the client's documented <c>oldest - 1</c> resume formula wrap to
@@ -889,7 +889,7 @@ public sealed class SessionEventDistributorTests
     }
 
     /// <summary>
-    ///     GWC-25: the same next-deliverable-sequence rule applies when retention is disabled
+    ///     The same next-deliverable-sequence rule applies when retention is disabled
     ///     outright (replay capacity 0) — the ring is always empty, so a behind cursor must still
     ///     get a usable resume anchor rather than <c>0</c>.
     /// </summary>
@@ -924,7 +924,7 @@ public sealed class SessionEventDistributorTests
     }
 
     /// <summary>
-    ///     GWC-25 regression: a client that applies the documented
+    ///     Regression: a client that applies the documented
     ///     <c>after_worker_sequence = oldest_available_sequence - 1</c> formula to an empty-ring
     ///     ReplayGap resumes with a live watermark equal to the highest observed sequence, so the
     ///     caller's live filter passes every subsequent event. Under the pre-fix <c>0</c> the

src/ZB.MOM.WW.MxGateway.Tests/Gateway/Sessions/SessionManagerTests.cs

@@ -41,7 +41,7 @@ public sealed class SessionManagerTests
     ///     Verifies the pipe name stays short enough that its Unix-domain-socket path
     ///     (TMPDIR + "CoreFxPipe_" + name) fits the 104-byte macOS sun_path limit under the
     ///     default per-user TMPDIR (~49 chars), and keeps the pid + session-guid uniqueness
-    ///     contract (NEXT-01).
+    ///     contract.
     /// </summary>
     /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
@@ -110,7 +110,7 @@ public sealed class SessionManagerTests
     }
 
     /// <summary>
-    ///     Verifies a session inherits the owning API key's dashboard-visibility tags (SEC-25),
+    ///     Verifies a session inherits the owning API key's dashboard-visibility tags,
     ///     compared ordinal-ignore-case so a differently cased grant still matches.
     /// </summary>
     /// <returns>A task that represents the asynchronous operation.</returns>

src/ZB.MOM.WW.MxGateway.Tests/Gateway/Sessions/SessionWorkerClientFactoryFakeWorkerTests.cs

@@ -24,7 +24,10 @@ public sealed class SessionWorkerClientFactoryFakeWorkerTests : IAsyncLifetime
 
     private readonly List<IWorkerTaskLauncher> _launchers = [];
 
-    /// <inheritdoc />
+    /// <summary>
+    /// Completes immediately; no asynchronous setup is required before each test.
+    /// </summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     public Task InitializeAsync() => Task.CompletedTask;
 
     /// <summary>