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.Galaxy.Tests/Runtime/GalaxyDriverReadTests.cs

@@ -23,7 +23,9 @@ public sealed class GalaxyDriverReadTests
 
     private sealed class FakeReader : IGalaxyDataReader
     {
+        /// <summary>Gets the last read request.</summary>
         public IReadOnlyList<string>? LastRequest { get; private set; }
+        /// <summary>Gets or sets the function that decides the result for a given tag list.</summary>
         public Func<IReadOnlyList<string>, IReadOnlyList<DataValueSnapshot>> Decide { get; set; } =
             tags => tags.Select(t => new DataValueSnapshot(
                 Value: t,
@@ -31,6 +33,7 @@ public sealed class GalaxyDriverReadTests
                 SourceTimestampUtc: DateTime.UtcNow,
                 ServerTimestampUtc: DateTime.UtcNow)).ToArray();
 
+        /// <inheritdoc />
         public Task<IReadOnlyList<DataValueSnapshot>> ReadAsync(
             IReadOnlyList<string> fullReferences, CancellationToken cancellationToken)
         {
@@ -39,6 +42,7 @@ public sealed class GalaxyDriverReadTests
         }
     }
 
+    /// <summary>Verifies that ReadAsync routes through the injected reader.</summary>
     [Fact]
     public async Task ReadAsync_RoutesThroughInjectedReader()
     {
@@ -53,6 +57,7 @@ public sealed class GalaxyDriverReadTests
         result[0].StatusCode.ShouldBe(StatusCodeMap.Good);
     }
 
+    /// <summary>Verifies that ReadAsync returns empty without calling the reader for an empty request.</summary>
     [Fact]
     public async Task ReadAsync_EmptyRequest_ReturnsEmpty_WithoutCallingReader()
     {
@@ -65,6 +70,7 @@ public sealed class GalaxyDriverReadTests
         reader.LastRequest.ShouldBeNull();
     }
 
+    /// <summary>Verifies that ReadAsync throws when seams and production runtime are not built.</summary>
     [Fact]
     public async Task ReadAsync_NoSeams_AndNoProductionRuntime_Throws()
     {
@@ -79,6 +85,7 @@ public sealed class GalaxyDriverReadTests
         ex.Message.ShouldContain("production runtime not built");
     }
 
+    /// <summary>Verifies that ReadAsync throws after the driver is disposed.</summary>
     [Fact]
     public async Task ReadAsync_AfterDispose_Throws()
     {
@@ -88,6 +95,7 @@ public sealed class GalaxyDriverReadTests
             driver.ReadAsync(["x"], CancellationToken.None));
     }
 
+    /// <summary>Verifies that ReadAsync resolves from the first OnDataChange event on the subscribe-once path.</summary>
     [Fact]
     public async Task ReadAsync_SubscribeOncePath_ResolvesFromFirstOnDataChange()
     {
@@ -111,6 +119,7 @@ public sealed class GalaxyDriverReadTests
         subscriber.UnsubscribedHandles.ShouldContain(itemHandle);
     }
 
+    /// <summary>Verifies that ReadAsync surfaces rejected tags as bad status on the subscribe-once path.</summary>
     [Fact]
     public async Task ReadAsync_SubscribeOncePath_RejectedTagSurfacesAsBadStatus()
     {
@@ -130,6 +139,7 @@ public sealed class GalaxyDriverReadTests
         result[1].StatusCode.ShouldBe(0x80000000u); // Bad
     }
 
+    /// <summary>Verifies that ReadAsync preserves reader status codes.</summary>
     [Fact]
     public async Task ReadAsync_PreservesReaderStatusCodes()
     {