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/Alarms/GatewayAlarmMonitorProviderModeTests.cs

@@ -624,7 +624,7 @@ public sealed class GatewayAlarmMonitorProviderModeTests
     }
 
     /// <summary>
-    ///     GWC-37: a Galaxy Repository outage at startup used to leave one <c>LogWarning</c> and an
+    ///     A Galaxy Repository outage at startup used to leave one <c>LogWarning</c> and an
     ///     empty subtag watch-list that stayed empty for the monitor's whole life — invisible until
     ///     a failover found the standby covering nothing. The condition is now a standing verdict
     ///     on the provider status, so it reaches the alarm feed, the dashboard badge and every
@@ -661,7 +661,7 @@ public sealed class GatewayAlarmMonitorProviderModeTests
     }
 
     /// <summary>
-    ///     GWC-37: the failover edge is the moment the watch-list stops being theoretical, so the
+    ///     The failover edge is the moment the watch-list stops being theoretical, so the
     ///     monitor re-resolves it there, hot-swaps the recovered list through
     ///     <c>UpdateAlarmWatchList</c>, and publishes the acknowledged verdict on the same status
     ///     frame the failover produces. The update must precede the status frame so the frame never
@@ -748,6 +748,7 @@ public sealed class GatewayAlarmMonitorProviderModeTests
     }
 
     /// <summary>Periodic reconciliation applies a recovered watch list once and suppresses an unchanged resolution on the next cadence.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task WatchListRefresh_PeriodicRecovery_SendsExactlyOneMaterialUpdate()
     {
@@ -774,6 +775,7 @@ public sealed class GatewayAlarmMonitorProviderModeTests
     }
 
     /// <summary>A rejected refresh keeps the old fingerprint and degraded verdict so the same material change is retried.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task WatchListRefresh_WorkerRejects_RetainsFingerprintAndRetriesSameTargets()
     {
@@ -937,7 +939,7 @@ public sealed class GatewayAlarmMonitorProviderModeTests
     ///     <see cref="IAlarmWatchListResolver"/> that hands out a scripted sequence of
     ///     resolutions — one per call, the last repeating — and counts the calls, so a test can
     ///     drive "discovery was down at subscribe and back up by the failover" and assert that the
-    ///     second resolution happened at all (GWC-37).
+    ///     second resolution happened at all.
     /// </summary>
     /// <param name="script">Resolutions to return, in call order.</param>
     private sealed class ScriptedWatchListResolver(params AlarmWatchListResolution[] script) : IAlarmWatchListResolver
@@ -997,6 +999,8 @@ public sealed class GatewayAlarmMonitorProviderModeTests
             _events.Writer.TryWrite(new WorkerEvent { Event = mxEvent });
 
         /// <summary>Pushes a provider-mode change onto the worker event stream.</summary>
+        /// <param name="mode">The provider mode being reported.</param>
+        /// <param name="reason">The reason for the mode change.</param>
         public void EmitModeChange(AlarmProviderMode mode, string reason) => EmitEvent(new MxEvent
         {
             OnAlarmProviderModeChanged = new OnAlarmProviderModeChangedEvent
@@ -1008,6 +1012,9 @@ public sealed class GatewayAlarmMonitorProviderModeTests
         });
 
         /// <summary>Waits until at least the requested number of update commands have arrived.</summary>
+        /// <param name="count">The minimum number of update commands to wait for.</param>
+        /// <param name="timeout">The maximum time to wait.</param>
+        /// <returns>A task that represents the asynchronous operation.</returns>
         public async Task WaitForUpdateCountAsync(int count, TimeSpan timeout)
         {
             await WaitUntilAsync(() => UpdateCommands.Count >= count, timeout);