docs: backfill XML documentation across 756 files

Adds <summary>, <param>, <typeparam>, and <inheritdoc/> tags to public
members surfaced by commentchecker — resolves 5,847 of 5,869 issues
(99.6%) across three /fixdocs passes.

src/Core/ZB.MOM.WW.OtOpcUa.Configuration/LocalCache/ILocalConfigCache.cs

@@ -13,7 +13,18 @@ namespace ZB.MOM.WW.OtOpcUa.Configuration.LocalCache;
 /// </remarks>
 public interface ILocalConfigCache
 {
+    /// <summary>Retrieves the most recent generation snapshot for the specified cluster.</summary>
+    /// <param name="clusterId">The cluster identifier.</param>
+    /// <param name="ct">The cancellation token.</param>
+    /// <returns>The most recent generation snapshot, or null if none exists.</returns>
     Task<GenerationSnapshot?> GetMostRecentAsync(string clusterId, CancellationToken ct = default);
+    /// <summary>Stores a generation snapshot in the local cache.</summary>
+    /// <param name="snapshot">The generation snapshot to store.</param>
+    /// <param name="ct">The cancellation token.</param>
     Task PutAsync(GenerationSnapshot snapshot, CancellationToken ct = default);
+    /// <summary>Removes old generations, keeping only the most recent N.</summary>
+    /// <param name="clusterId">The cluster identifier.</param>
+    /// <param name="keepLatest">The number of latest generations to keep.</param>
+    /// <param name="ct">The cancellation token.</param>
     Task PruneOldGenerationsAsync(string clusterId, int keepLatest = 10, CancellationToken ct = default);
 }