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/Server/ZB.MOM.WW.OtOpcUa.Runtime.Tests/Drivers/DriverHostActorTests.cs

@@ -17,6 +17,7 @@ public sealed class DriverHostActorTests : RuntimeActorTestBase
     private static readonly RevisionHash RevA = RevisionHash.Parse(new string('a', 64));
     private static readonly RevisionHash RevB = RevisionHash.Parse(new string('b', 64));
 
+    /// <summary>Verifies that bootstrap with no prior state enters the Steady state.</summary>
     [Fact]
     public void Bootstrap_with_no_prior_state_enters_Steady()
     {
@@ -33,6 +34,7 @@ public sealed class DriverHostActorTests : RuntimeActorTestBase
         ack.NodeId.ShouldBe(TestNode);
     }
 
+    /// <summary>Verifies that dispatching the same revision is acked immediately without apply work.</summary>
     [Fact]
     public void Same_revision_dispatch_is_acked_immediately_with_no_apply_work()
     {
@@ -66,6 +68,7 @@ public sealed class DriverHostActorTests : RuntimeActorTestBase
         verify.NodeDeploymentStates.Count(s => s.NodeId == TestNode.Value).ShouldBe(1);
     }
 
+    /// <summary>Verifies that a new revision dispatch writes an Applied NodeDeploymentState.</summary>
     [Fact]
     public void New_revision_dispatch_writes_Applied_NodeDeploymentState()
     {
@@ -89,6 +92,7 @@ public sealed class DriverHostActorTests : RuntimeActorTestBase
         }, duration: TimeSpan.FromSeconds(3));
     }
 
+    /// <summary>Verifies that an orphaned Applying row on bootstrap is replayed.</summary>
     [Fact]
     public void Orphan_Applying_row_on_bootstrap_replays_apply()
     {