docs(src): add missing XML docs and strip tracking-ID comments

Sweep of 203 source files resolving CommentChecker findings: add
<summary>/<param>/<returns>/<inheritdoc> where missing, and remove
resolved task/issue tracking markers (Tests-NNN, Worker-NNN, Server-NNN,
Task N) from code comments. Comment/doc-only — no logic changes.
Server+Tests build clean under TreatWarningsAsErrors.

src/ZB.MOM.WW.MxGateway.Server/Grpc/MxAccessGatewayService.cs

@@ -164,15 +164,6 @@ public sealed class MxAccessGatewayService(
     }
 
     /// <inheritdoc />
-    /// <remarks>
-    ///     Surfaces the public AcknowledgeAlarm RPC. Acknowledgement is
-    ///     session-less: the gateway routes it through the always-on
-    ///     <see cref="IGatewayAlarmService"/> monitor session. An
-    ///     <c>alarm_full_reference</c> that parses as a canonical GUID forwards
-    ///     to <c>AcknowledgeAlarmCommand</c>; a <c>Provider!Group.Tag</c>
-    ///     reference forwards to <c>AcknowledgeAlarmByNameCommand</c>; anything
-    ///     else returns an <c>InvalidRequest</c> diagnostic in the reply.
-    /// </remarks>
     public override async Task<AcknowledgeAlarmReply> AcknowledgeAlarm(
         AcknowledgeAlarmRequest request,
         ServerCallContext context)
@@ -195,14 +186,6 @@ public sealed class MxAccessGatewayService(
     }
 
     /// <inheritdoc />
-    /// <remarks>
-    ///     Surfaces the public StreamAlarms RPC — the session-less central
-    ///     alarm feed. The stream opens with one <c>active_alarm</c> per
-    ///     currently-active alarm, then a single <c>snapshot_complete</c>, then
-    ///     a <c>transition</c> for every subsequent change. Served by the
-    ///     gateway's always-on <see cref="IGatewayAlarmService"/> monitor; any
-    ///     number of clients fan out from the single monitor.
-    /// </remarks>
     public override async Task StreamAlarms(
         StreamAlarmsRequest request,
         IServerStreamWriter<AlarmFeedMessage> responseStream,
@@ -226,12 +209,6 @@ public sealed class MxAccessGatewayService(
     }
 
     /// <inheritdoc />
-    /// <remarks>
-    ///     Snapshot of the active-alarm cache maintained by the gateway's
-    ///     always-on alarm monitor. Streams one <see cref="ActiveAlarmSnapshot"/>
-    ///     per currently-active alarm and completes — no transitions are
-    ///     emitted. Use <c>StreamAlarms</c> for a live transition feed.
-    /// </remarks>
     public override async Task QueryActiveAlarms(
         QueryActiveAlarmsRequest request,
         IServerStreamWriter<ActiveAlarmSnapshot> responseStream,