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/ZB.MOM.WW.OtOpcUa.Driver.Modbus/ModbusDriverFactoryExtensions.cs

@@ -7,7 +7,7 @@ namespace ZB.MOM.WW.OtOpcUa.Driver.Modbus;
 
 /// <summary>
 ///     Static factory registration helper for <see cref="ModbusDriver"/>. Server's Program.cs
-///     calls <see cref="Register"/> once at startup; the bootstrapper (task #248) then
+///     calls <see cref="Register"/> once at startup; the bootstrapper then
 ///     materialises Modbus DriverInstance rows from the central config DB into live driver
 ///     instances. Mirrors <c>GalaxyProxyDriverFactoryExtensions</c> / <c>FocasDriverFactoryExtensions</c>.
 /// </summary>
@@ -33,6 +33,7 @@ public static class ModbusDriverFactoryExtensions
     /// <summary>Public for the Server-side bootstrapper + test consumers (Admin.Tests, etc.).</summary>
     /// <param name="driverInstanceId">The unique identifier for the driver instance.</param>
     /// <param name="driverConfigJson">The JSON configuration string for the driver.</param>
+    /// <returns>The constructed <see cref="ModbusDriver"/> instance.</returns>
     public static ModbusDriver CreateInstance(string driverInstanceId, string driverConfigJson)
         => CreateInstance(driverInstanceId, driverConfigJson, loggerFactory: null);
 
@@ -40,6 +41,7 @@ public static class ModbusDriverFactoryExtensions
     /// <param name="driverInstanceId">The unique identifier for the driver instance.</param>
     /// <param name="driverConfigJson">The JSON configuration string for the driver.</param>
     /// <param name="loggerFactory">Optional logger factory for creating loggers per driver instance.</param>
+    /// <returns>The constructed <see cref="ModbusDriver"/> instance.</returns>
     public static ModbusDriver CreateInstance(string driverInstanceId, string driverConfigJson, ILoggerFactory? loggerFactory)
     {
         ArgumentException.ThrowIfNullOrWhiteSpace(driverInstanceId);
@@ -118,11 +120,6 @@ public static class ModbusDriverFactoryExtensions
         var name = t.Name ?? throw new InvalidOperationException(
             $"Modbus config for '{driverInstanceId}' has a tag missing Name");
 
-        // Driver.Modbus-009: a String tag with StringLength = 0 yields RegisterCount = 0, which
-        // turns into an FC03/FC04 with quantity 0 — a spec-illegal request the PLC rejects with
-        // exception 03. Catch the misconfiguration at bind time with a clear diagnostic instead
-        // of waiting for the cryptic Illegal Data Value to surface at runtime.
-
         // AddressString takes precedence over the structured fields (Region/Address/DataType/
         // ByteOrder/BitIndex/StringLength/ArrayCount). Tags can mix forms freely — newer pasted
         // rows use the grammar string, legacy rows keep the structured form. Fields not derivable
@@ -178,7 +175,7 @@ public static class ModbusDriverFactoryExtensions
     }
 
     /// <summary>
-    ///     Driver.Modbus-009: reject <c>StringLength = 0</c> for <c>String</c>-typed tags. The
+    ///     Rejects <c>StringLength = 0</c> for <c>String</c>-typed tags. The
     ///     driver computes <c>RegisterCount = (StringLength + 1) / 2</c> which would emit an
     ///     FC03/FC04 with <c>quantity = 0</c>, a spec-illegal request the PLC rejects with
     ///     exception 03 (Illegal Data Value). Surface as a clear bind-time error.
@@ -249,7 +246,7 @@ public static class ModbusDriverFactoryExtensions
         /// <summary>Gets or sets the probe configuration.</summary>
         public ModbusProbeDto? Probe { get; init; }
 
-        /// <summary>Gets or sets the keep-alive configuration (connection-layer knob #139).</summary>
+        /// <summary>Gets or sets the keep-alive configuration (connection-layer knob).</summary>
         public ModbusKeepAliveDto? KeepAlive { get; init; }
         /// <summary>Gets or sets the idle disconnect timeout in milliseconds.</summary>
         public int? IdleDisconnectMs { get; init; }