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.

tests/Drivers/ZB.MOM.WW.OtOpcUa.Driver.Modbus.Tests/ModbusTcpReconnectTests.cs

@@ -22,11 +22,14 @@ public sealed class ModbusTcpReconnectTests
     private sealed class FlakeyModbusServer : IAsyncDisposable
     {
         private readonly TcpListener _listener;
+        /// <summary>Gets the TCP port the server is listening on.</summary>
         public int Port => ((IPEndPoint)_listener.LocalEndpoint).Port;
+        /// <summary>Gets or sets the number of transactions to complete before closing the connection.</summary>
         public int DropAfterNTransactions { get; set; } = int.MaxValue;
         private readonly CancellationTokenSource _stop = new();
         private int _txCount;
 
+        /// <summary>Initializes a new instance and starts listening on a loopback port.</summary>
         public FlakeyModbusServer()
         {
             _listener = new TcpListener(IPAddress.Loopback, 0);
@@ -103,6 +106,7 @@ public sealed class ModbusTcpReconnectTests
             return true;
         }
 
+        /// <summary>Stops the server and releases resources.</summary>
         public async ValueTask DisposeAsync()
         {
             _stop.Cancel();
@@ -111,6 +115,7 @@ public sealed class ModbusTcpReconnectTests
         }
     }
 
+    /// <summary>Verifies that the transport recovers from a mid-session socket drop with auto-reconnect enabled.</summary>
     [Fact]
     public async Task Transport_recovers_from_mid_session_drop_and_retries_successfully()
     {
@@ -130,6 +135,7 @@ public sealed class ModbusTcpReconnectTests
         second[0].ShouldBe((byte)0x03);
     }
 
+    /// <summary>Verifies that socket drops propagate to the caller when auto-reconnect is disabled.</summary>
     [Fact]
     public async Task Transport_without_AutoReconnect_propagates_drop_to_caller()
     {