docs(xmldoc): fill missing XML docs + strip tracking-ID comments across src

Adds <summary>/<param>/<returns>/<inheritdoc> where missing and removes
project bookkeeping IDs (task/tracking refs) from shipped code comments,
so the docs read cleanly and CommentChecker is quiet except for known
false positives (PLC/protocol terms, event/IEqualityComparer inheritdoc).
Doc/comment-only; no logic changed; solution builds clean.

src/Core/ZB.MOM.WW.OtOpcUa.Configuration/OtOpcUaConfigDbContext.cs

@@ -72,8 +72,6 @@ public sealed class OtOpcUaConfigDbContext(DbContextOptions<OtOpcUaConfigDbConte
     /// <summary>Gets the DbSet of data protection keys.</summary>
     public DbSet<DataProtectionKey> DataProtectionKeys => Set<DataProtectionKey>();
 
-    /// <summary>Configures the entity model when the context is first created.</summary>
-    /// <param name="modelBuilder">The model builder used to configure the context.</param>
     /// <inheritdoc />
     protected override void OnModelCreating(ModelBuilder modelBuilder)
     {
@@ -151,13 +149,12 @@ public sealed class OtOpcUaConfigDbContext(DbContextOptions<OtOpcUaConfigDbConte
                 .HasForeignKey(x => x.ClusterId)
                 .OnDelete(DeleteBehavior.Restrict);
 
-            // Fleet-wide unique per decision #86
+            // Fleet-wide unique.
             e.HasIndex(x => x.ApplicationUri).IsUnique().HasDatabaseName("UX_ClusterNode_ApplicationUri");
             e.HasIndex(x => x.ClusterId).HasDatabaseName("IX_ClusterNode_ClusterId");
             // v2: the "one Primary per cluster" filtered unique index (and the RedundancyRole
             // column it filtered on) are gone. Akka cluster leader-of-driver-role is the
-            // authoritative primary signal (see RedundancyStateActor + ServiceLevelCalculator,
-            // Task 35).
+            // authoritative primary signal (see RedundancyStateActor + ServiceLevelCalculator).
         });
     }