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.AuditLog/Kpi/AuditLogKpiSampleSource.cs

@@ -3,12 +3,6 @@ using ZB.MOM.WW.ScadaBridge.Commons.Interfaces.Kpi;
 using ZB.MOM.WW.ScadaBridge.Commons.Interfaces.Repositories;
 using ZB.MOM.WW.ScadaBridge.Commons.Types.Kpi;
 
-// Task 10 (arch-review 04): the append-only repository leaves the snapshot's
-// BacklogTotal at zero; the real backlog is the cross-site health aggregate that
-// only the central node knows. An optional IAuditBacklogProvider supplies it so
-// the *history* sample stops recording a hardwired zero (the live tile already
-// filled this in). Sites/tests leave it unregistered → null → snapshot fallback.
-
 namespace ZB.MOM.WW.ScadaBridge.AuditLog.Kpi;
 
 /// <summary>
@@ -64,7 +58,7 @@ public sealed class AuditLogKpiSampleSource : IKpiSampleSource
     /// Optional cross-site backlog aggregate. When registered (central node), the
     /// <c>backlogTotal</c> sample records its value; when absent (sites / unit tests,
     /// where MS.DI resolves the default) the source falls back to the snapshot's own
-    /// <c>BacklogTotal</c> — i.e. zero, the pre-Task-10 behavior. Injecting the seam
+    /// <c>BacklogTotal</c> — i.e. zero, the previous default behavior. Injecting the seam
     /// keeps the append-only repo out of the in-memory health aggregator.
     /// </param>
     public AuditLogKpiSampleSource(