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/LiteDbConfigCache.cs

@@ -20,6 +20,8 @@ public sealed class LiteDbConfigCache : ILocalConfigCache, IDisposable
     // page-level write, not the find-then-insert window.
     private readonly SemaphoreSlim _writeGate = new(initialCount: 1, maxCount: 1);
 
+    /// <summary>Initializes a new instance of the <see cref="LiteDbConfigCache"/> class.</summary>
+    /// <param name="dbPath">Path to the LiteDB database file.</param>
     public LiteDbConfigCache(string dbPath)
     {
         // LiteDB can be tolerant of header-only corruption at construction time (it may overwrite
@@ -43,6 +45,9 @@ public sealed class LiteDbConfigCache : ILocalConfigCache, IDisposable
         }
     }
 
+    /// <summary>Gets the most recent snapshot for the specified cluster.</summary>
+    /// <param name="clusterId">The cluster ID.</param>
+    /// <param name="ct">Cancellation token.</param>
     public Task<GenerationSnapshot?> GetMostRecentAsync(string clusterId, CancellationToken ct = default)
     {
         ct.ThrowIfCancellationRequested();
@@ -53,6 +58,9 @@ public sealed class LiteDbConfigCache : ILocalConfigCache, IDisposable
         return Task.FromResult<GenerationSnapshot?>(snapshot);
     }
 
+    /// <summary>Stores a snapshot in the cache.</summary>
+    /// <param name="snapshot">The snapshot to store.</param>
+    /// <param name="ct">Cancellation token.</param>
     public async Task PutAsync(GenerationSnapshot snapshot, CancellationToken ct = default)
     {
         ct.ThrowIfCancellationRequested();
@@ -81,6 +89,10 @@ public sealed class LiteDbConfigCache : ILocalConfigCache, IDisposable
         }
     }
 
+    /// <summary>Removes old generation snapshots, keeping only the latest ones.</summary>
+    /// <param name="clusterId">The cluster ID.</param>
+    /// <param name="keepLatest">Number of latest generations to keep.</param>
+    /// <param name="ct">Cancellation token.</param>
     public Task PruneOldGenerationsAsync(string clusterId, int keepLatest = 10, CancellationToken ct = default)
     {
         ct.ThrowIfCancellationRequested();
@@ -97,6 +109,7 @@ public sealed class LiteDbConfigCache : ILocalConfigCache, IDisposable
         return Task.CompletedTask;
     }
 
+    /// <summary>Releases all resources used by the cache.</summary>
     public void Dispose()
     {
         _writeGate.Dispose();