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/AbCipDriverWholeUdtReadTests.cs

@@ -34,6 +34,7 @@ public sealed class AbCipDriverWholeUdtReadTests
             new AbCipStructureMember("Torque", AbCipDataType.Real),  // offset 4
         ]);
 
+    /// <summary>Verifies that multiple members of the same UDT trigger only one parent read.</summary>
     [Fact]
     public async Task Two_members_of_same_udt_trigger_one_parent_read()
     {
@@ -53,6 +54,7 @@ public sealed class AbCipDriverWholeUdtReadTests
         factory.Tags["Motor"].ReadCount.ShouldBe(1);
     }
 
+    /// <summary>Verifies that each UDT member is decoded at its correct offset.</summary>
     [Fact]
     public async Task Each_member_decodes_at_its_own_offset()
     {
@@ -78,6 +80,7 @@ public sealed class AbCipDriverWholeUdtReadTests
         snapshots[1].Value.ShouldBe(9.5f);
     }
 
+    /// <summary>Verifies that parent read failure marks all grouped members as Bad.</summary>
     [Fact]
     public async Task Parent_read_failure_stamps_every_grouped_member_Bad()
     {
@@ -97,6 +100,7 @@ public sealed class AbCipDriverWholeUdtReadTests
         snapshots[1].Value.ShouldBeNull();
     }
 
+    /// <summary>Verifies that mixed batches group UDT members and fall back to atomic reads.</summary>
     [Fact]
     public async Task Mixed_batch_groups_udt_and_falls_back_atomics()
     {
@@ -116,6 +120,7 @@ public sealed class AbCipDriverWholeUdtReadTests
         factory.Tags["PlainDint"].ReadCount.ShouldBe(1);
     }
 
+    /// <summary>Verifies that a single UDT member uses the per-tag read path rather than grouping.</summary>
     [Fact]
     public async Task Single_member_of_Udt_uses_per_tag_read_path()
     {