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/Drivers/Cli/ZB.MOM.WW.OtOpcUa.Driver.Modbus.Cli/ModbusCommandBase.cs

@@ -48,6 +48,7 @@ public abstract class ModbusCommandBase : DriverCommandBase
     ///     command against its own keep-alive reads.
     /// </summary>
     /// <param name="tags">The tag definitions to include in the options.</param>
+    /// <returns>A <see cref="ModbusDriverOptions"/> ready to hand to the driver constructor.</returns>
     protected ModbusDriverOptions BuildOptions(IReadOnlyList<ModbusTagDefinition> tags) => new()
     {
         Host = Host,
@@ -66,7 +67,7 @@ public abstract class ModbusCommandBase : DriverCommandBase
     protected string DriverInstanceId => $"modbus-cli-{Host}:{Port}";
 
     /// <summary>
-    ///     Driver.Modbus.Cli-003: validate the endpoint flags at parse time so the operator
+    ///     Validate the endpoint flags at parse time so the operator
     ///     gets a clear CliFx error instead of an opaque socket / argument exception thrown
     ///     deep inside the driver. Ranges:
     ///     <list type="bullet">