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/ModbusCoalescingTests.cs

@@ -15,7 +15,13 @@ public sealed class ModbusCoalescingTests
     private sealed class CountingTransport : IModbusTransport
     {
         public readonly List<(byte Unit, byte Fc, ushort Address, ushort Quantity)> Reads = new();
+        /// <summary>Establishes a connection asynchronously.</summary>
+        /// <param name="ct">Cancellation token for the operation.</param>
         public Task ConnectAsync(CancellationToken ct) => Task.CompletedTask;
+        /// <summary>Sends a Modbus PDU and receives the response.</summary>
+        /// <param name="unitId">The Modbus unit identifier.</param>
+        /// <param name="pdu">The Protocol Data Unit to send.</param>
+        /// <param name="ct">Cancellation token for the operation.</param>
         public Task<byte[]> SendAsync(byte unitId, byte[] pdu, CancellationToken ct)
         {
             var addr = (ushort)((pdu[1] << 8) | pdu[2]);
@@ -32,9 +38,11 @@ public sealed class ModbusCoalescingTests
                 default: return Task.FromResult(new byte[] { pdu[0], 0, 0 });
             }
         }
+        /// <summary>Disposes the transport asynchronously.</summary>
         public ValueTask DisposeAsync() => ValueTask.CompletedTask;
     }
 
+    /// <summary>Verifies that MaxReadGap=0 defaults to per-tag reads without coalescing.</summary>
     [Fact]
     public async Task MaxReadGap_Zero_Defaults_To_Per_Tag_Reads()
     {
@@ -53,6 +61,7 @@ public sealed class ModbusCoalescingTests
         fc03Reads.Count.ShouldBe(2);
     }
 
+    /// <summary>Verifies that MaxReadGap bridges adjacent tags into a single read.</summary>
     [Fact]
     public async Task MaxReadGap_Bridges_Two_Adjacent_Tags_Into_One_Read()
     {
@@ -74,6 +83,7 @@ public sealed class ModbusCoalescingTests
         fc03Reads[0].Quantity.ShouldBe((ushort)5);  // 100..104
     }
 
+    /// <summary>Verifies that MaxReadGap splits blocks when gaps exceed threshold.</summary>
     [Fact]
     public async Task MaxReadGap_Splits_When_Gap_Exceeds_Threshold()
     {
@@ -93,6 +103,7 @@ public sealed class ModbusCoalescingTests
         fc03Reads.Count.ShouldBe(2);    // T1+T2 coalesced; T3 alone
     }
 
+    /// <summary>Verifies that tags with CoalesceProhibited are read separately.</summary>
     [Fact]
     public async Task CoalesceProhibited_Tag_Reads_Alone()
     {
@@ -113,6 +124,7 @@ public sealed class ModbusCoalescingTests
         fc03Reads.Count.ShouldBe(2);
     }
 
+    /// <summary>Verifies that coalescing does not cross unit ID boundaries.</summary>
     [Fact]
     public async Task Coalescing_Does_Not_Cross_UnitId_Boundaries()
     {
@@ -132,6 +144,7 @@ public sealed class ModbusCoalescingTests
         fc03Reads.Select(r => r.Unit).Distinct().Count().ShouldBe(2);
     }
 
+    /// <summary>Verifies that coalescing splits blocks exceeding MaxRegistersPerRead.</summary>
     [Fact]
     public async Task Coalescing_Splits_Block_That_Exceeds_MaxRegistersPerRead()
     {
@@ -152,6 +165,7 @@ public sealed class ModbusCoalescingTests
         fc03Reads.Count.ShouldBe(2);
     }
 
+    /// <summary>Verifies that coalesced reads surface each tag value independently.</summary>
     [Fact]
     public async Task Coalesced_Read_Surfaces_Each_Tag_Value_Independently()
     {