docs(xml): fill missing XML doc comments + strip task-tracking refs across src (fixdocs)

Add missing <summary>/<param>/<returns>/<typeparam> tags and switch
interface implementations to <inheritdoc/> across 106 files; strip
project bookkeeping identifiers (Task NN, #05-TNN, PLAN-04, StoreAndForward-0NN)
from shipped code comments while preserving the descriptive rationale.
Comment-only: zero code-logic lines changed; solution builds 0/0.

Claude-Session: https://claude.ai/code/session_01MtdgwpEeCUn6cUA5f1LMPj

src/ZB.MOM.WW.ScadaBridge.Communication/Actors/CentralCommunicationActor.cs

@@ -54,6 +54,8 @@ public class DefaultSiteClientFactory : ISiteClientFactory
     /// letters/digits/'-'/'_' pass through, everything else becomes '_'. Uniqueness
     /// is NOT required here (the generation suffix guarantees it); only validity is.
     /// </summary>
+    /// <param name="siteId">The SiteIdentifier to sanitize.</param>
+    /// <returns>A valid Akka actor-path element derived from <paramref name="siteId"/>.</returns>
     internal static string SanitizeForActorName(string siteId)
     {
         if (string.IsNullOrEmpty(siteId)) return "site";
@@ -144,11 +146,6 @@ public class CentralCommunicationActor : ReceiveActor
     /// timeout/fault path without waiting 30 s. When the window is exceeded the Ask
     /// faults and that fault is piped back to the caller as a
     /// <see cref="Status.Failure"/> (see <see cref="HandleIngestAuditEvents"/>).
-    ///
-    /// The gRPC and ClusterClient ingest transports differ in fault semantics (the
-    /// gRPC handler surfaces the fault as an RpcException; here it becomes a piped
-    /// Status.Failure). Consolidating the two ingest transports is a scheduled
-    /// follow-up — see arch review 02, Underdeveloped #1.
     /// </summary>
     private readonly TimeSpan _auditIngestAskTimeout;
 

src/ZB.MOM.WW.ScadaBridge.Communication/Grpc/SiteStreamGrpcServer.cs

@@ -561,7 +561,7 @@ public class SiteStreamGrpcServer : SiteStreamService.SiteStreamServiceBase
             ? DateTime.SpecifyKind(request.SinceUtc.ToDateTime(), DateTimeKind.Utc)
             : DateTime.MinValue;
 
-        // Composite-keyset cursor (Task 15): proto3 defaults an unset string to
+        // Composite-keyset cursor: proto3 defaults an unset string to
         // "", which the store treats as "no cursor" (legacy inclusive >= behaviour)
         // — so an older central that never sets after_id is unaffected.
         var afterId = string.IsNullOrEmpty(request.AfterId) ? null : request.AfterId;