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.AbCip.Tests/AbCipBoolInDIntRmwTests.cs

@@ -18,6 +18,7 @@ public sealed class AbCipBoolInDIntRmwTests
         // Uses the base FakeAbCipTag's Value + ReadCount + WriteCount.
     }
 
+    /// <summary>Verifies that bit set reads parent, ORs bit, and writes back.</summary>
     [Fact]
     public async Task Bit_set_reads_parent_ORs_bit_writes_back()
     {
@@ -48,6 +49,7 @@ public sealed class AbCipBoolInDIntRmwTests
         factory.Tags["Motor.Flags"].WriteCount.ShouldBe(1);
     }
 
+    /// <summary>Verifies that bit clear preserves other bits.</summary>
     [Fact]
     public async Task Bit_clear_preserves_other_bits()
     {
@@ -70,6 +72,7 @@ public sealed class AbCipBoolInDIntRmwTests
         (updated & ~(1 << 3)).ShouldBe(unchecked((int)0xFFFFFFF7)); // every other bit preserved
     }
 
+    /// <summary>Verifies that concurrent bit writes to same parent compose correctly.</summary>
     [Fact]
     public async Task Concurrent_bit_writes_to_same_parent_compose_correctly()
     {
@@ -94,6 +97,7 @@ public sealed class AbCipBoolInDIntRmwTests
         Convert.ToInt32(factory.Tags["Flags"].Value).ShouldBe(0xFF);
     }
 
+    /// <summary>Verifies that bit writes to different parents each get their own runtime.</summary>
     [Fact]
     public async Task Bit_writes_to_different_parents_each_get_own_runtime()
     {
@@ -120,6 +124,7 @@ public sealed class AbCipBoolInDIntRmwTests
         factory.Tags.ShouldContainKey("Motor2.Flags");
     }
 
+    /// <summary>Verifies that repeat bit writes reuse one parent runtime.</summary>
     [Fact]
     public async Task Repeat_bit_writes_reuse_one_parent_runtime()
     {