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/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Modbus/ModbusTcpTransport.cs

@@ -40,6 +40,14 @@ public sealed class ModbusTcpTransport : IModbusTransport
     private bool _disposed;
     private DateTime _lastSuccessUtc = DateTime.UtcNow;
 
+    /// <summary>Initializes a new instance of the <see cref="ModbusTcpTransport"/> class.</summary>
+    /// <param name="host">The host address or hostname of the Modbus server.</param>
+    /// <param name="port">The TCP port of the Modbus server.</param>
+    /// <param name="timeout">The timeout for socket operations.</param>
+    /// <param name="autoReconnect">Whether to automatically reconnect on socket failures.</param>
+    /// <param name="keepAlive">Optional keep-alive configuration for the socket.</param>
+    /// <param name="idleDisconnect">Optional duration after which an idle socket is disconnected.</param>
+    /// <param name="reconnect">Optional reconnect backoff configuration.</param>
     public ModbusTcpTransport(
         string host, int port, TimeSpan timeout, bool autoReconnect = true,
         ModbusKeepAliveOptions? keepAlive = null,
@@ -55,6 +63,8 @@ public sealed class ModbusTcpTransport : IModbusTransport
         _reconnect = reconnect ?? new ModbusReconnectOptions();
     }
 
+    /// <summary>Connects to the Modbus TCP server with IPv4 preference.</summary>
+    /// <param name="ct">The cancellation token for the operation.</param>
     public async Task ConnectAsync(CancellationToken ct)
     {
         // Resolve the host explicitly + prefer IPv4. .NET's TcpClient default-constructor is
@@ -110,12 +120,17 @@ public sealed class ModbusTcpTransport : IModbusTransport
     ///     minimum of 1 — protects callers from the int-cast truncation that turned 500&#160;ms
     ///     keep-alive timing into "use the default" on most OSes.
     /// </summary>
+    /// <param name="ts">The timespan to clamp to whole seconds.</param>
     internal static int ClampToWholeSeconds(TimeSpan ts)
     {
         var seconds = (int)Math.Ceiling(ts.TotalSeconds);
         return seconds < 1 ? 1 : seconds;
     }
 
+    /// <summary>Sends a Modbus PDU and returns the response, with automatic retry on socket failure.</summary>
+    /// <param name="unitId">The Modbus unit/slave ID.</param>
+    /// <param name="pdu">The protocol data unit to send.</param>
+    /// <param name="ct">The cancellation token for the operation.</param>
     public async Task<byte[]> SendAsync(byte unitId, byte[] pdu, CancellationToken ct)
     {
         if (_disposed) throw new ObjectDisposedException(nameof(ModbusTcpTransport));
@@ -268,6 +283,7 @@ public sealed class ModbusTcpTransport : IModbusTransport
         }
     }
 
+    /// <summary>Asynchronously disposes the transport and underlying socket resources.</summary>
     public async ValueTask DisposeAsync()
     {
         if (_disposed) return;