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.Core.Abstractions/IDriver.cs

@@ -8,10 +8,6 @@ namespace ZB.MOM.WW.OtOpcUa.Core.Abstractions;
 ///     <see cref="IHostConnectivityProbe"/>) are composable — a driver implements only what its
 ///     backend actually supports.
 /// </summary>
-/// <remarks>
-///     Per <c>docs/v2/plan.md</c> decisions #4 (composable capability interfaces) and #53
-///     (capability discovery via <c>is</c> checks — no redundant flag enum).
-/// </remarks>
 public interface IDriver
 {
     /// <summary>Stable logical ID of this driver instance, sourced from the central config DB.</summary>
@@ -23,6 +19,7 @@ public interface IDriver
     /// <summary>Initialize the driver from its <c>DriverConfig</c> JSON; open connections; prepare for first use.</summary>
     /// <param name="driverConfigJson">The driver configuration as JSON.</param>
     /// <param name="cancellationToken">Cancellation token for the operation.</param>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     Task InitializeAsync(string driverConfigJson, CancellationToken cancellationToken);
 
     /// <summary>
@@ -37,13 +34,16 @@ public interface IDriver
     /// </remarks>
     /// <param name="driverConfigJson">The driver configuration as JSON.</param>
     /// <param name="cancellationToken">Cancellation token for the operation.</param>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     Task ReinitializeAsync(string driverConfigJson, CancellationToken cancellationToken);
 
     /// <summary>Stop the driver, close connections, release resources. Called on shutdown or driver removal.</summary>
     /// <param name="cancellationToken">Cancellation token for the operation.</param>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     Task ShutdownAsync(CancellationToken cancellationToken);
 
     /// <summary>Current health snapshot, polled by Core for the status dashboard and ServiceLevel.</summary>
+    /// <returns>The driver's current health snapshot.</returns>
     DriverHealth GetHealth();
 
     /// <summary>
@@ -56,6 +56,7 @@ public interface IDriver
     ///     allocation tracking". Tier C drivers (process-isolated) report through the same
     ///     interface but the cache-flush is internal to their host.
     /// </remarks>
+    /// <returns>The approximate memory footprint in bytes.</returns>
     long GetMemoryFootprint();
 
     /// <summary>
@@ -63,5 +64,6 @@ public interface IDriver
     ///     Required-for-correctness state must NOT be flushed.
     /// </summary>
     /// <param name="cancellationToken">Cancellation token for the operation.</param>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     Task FlushOptionalCachesAsync(CancellationToken cancellationToken);
 }