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/DriverSpawnPlannerTests.cs

@@ -9,6 +9,7 @@ public sealed class DriverSpawnPlannerTests
     private static DriverInstanceSpec Spec(string id, string type = "Modbus", string config = "{\"host\":\"127.0.0.1\"}", bool enabled = true) =>
         new(Guid.NewGuid(), id, id, type, enabled, config);
 
+    /// <summary>Verifies that all new drivers are placed in ToSpawn when current is empty.</summary>
     [Fact]
     public void All_new_drivers_go_into_ToSpawn_when_current_is_empty()
     {
@@ -22,6 +23,7 @@ public sealed class DriverSpawnPlannerTests
         plan.ToStop.ShouldBeEmpty();
     }
 
+    /// <summary>Verifies that the same configuration yields an empty plan.</summary>
     [Fact]
     public void Same_config_yields_empty_plan()
     {
@@ -38,6 +40,7 @@ public sealed class DriverSpawnPlannerTests
         plan.ToStop.ShouldBeEmpty();
     }
 
+    /// <summary>Verifies that different configuration is routed to ApplyDelta.</summary>
     [Fact]
     public void Different_config_routes_to_ApplyDelta()
     {
@@ -54,6 +57,7 @@ public sealed class DriverSpawnPlannerTests
         plan.ToStop.ShouldBeEmpty();
     }
 
+    /// <summary>Verifies that removed drivers are routed to ToStop.</summary>
     [Fact]
     public void Removed_driver_routes_to_ToStop()
     {
@@ -71,6 +75,7 @@ public sealed class DriverSpawnPlannerTests
         plan.ToApplyDelta.ShouldBeEmpty();
     }
 
+    /// <summary>Verifies that disabled drivers with running children are routed to ToStop.</summary>
     [Fact]
     public void Disabled_driver_with_running_child_routes_to_ToStop()
     {
@@ -87,6 +92,7 @@ public sealed class DriverSpawnPlannerTests
         plan.ToApplyDelta.ShouldBeEmpty();
     }
 
+    /// <summary>Verifies that disabled new drivers are not spawned.</summary>
     [Fact]
     public void Disabled_new_driver_is_not_spawned()
     {
@@ -100,6 +106,7 @@ public sealed class DriverSpawnPlannerTests
         plan.ToStop.ShouldBeEmpty();
     }
 
+    /// <summary>Verifies that driver type changes trigger stop followed by respawn.</summary>
     [Fact]
     public void Driver_type_change_triggers_stop_plus_respawn()
     {