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.OpcUaServer.Tests/Phase7PlannerTests.cs

@@ -5,6 +5,7 @@ namespace ZB.MOM.WW.OtOpcUa.OpcUaServer.Tests;
 
 public sealed class Phase7PlannerTests
 {
+    /// <summary>Verifies that empty inputs produce an empty plan.</summary>
     [Fact]
     public void Empty_inputs_produce_empty_plan()
     {
@@ -16,6 +17,7 @@ public sealed class Phase7PlannerTests
         plan.IsEmpty.ShouldBeTrue();
     }
 
+    /// <summary>Verifies that identical compositions produce an empty plan.</summary>
     [Fact]
     public void Identical_compositions_produce_empty_plan()
     {
@@ -28,6 +30,7 @@ public sealed class Phase7PlannerTests
         plan.IsEmpty.ShouldBeTrue();
     }
 
+    /// <summary>Verifies that new equipment goes to the AddedEquipment list.</summary>
     [Fact]
     public void New_equipment_goes_to_AddedEquipment()
     {
@@ -44,6 +47,7 @@ public sealed class Phase7PlannerTests
         plan.ChangedEquipment.ShouldBeEmpty();
     }
 
+    /// <summary>Verifies that disappeared equipment goes to the RemovedEquipment list.</summary>
     [Fact]
     public void Disappeared_equipment_goes_to_RemovedEquipment()
     {
@@ -59,6 +63,7 @@ public sealed class Phase7PlannerTests
         plan.AddedEquipment.ShouldBeEmpty();
     }
 
+    /// <summary>Verifies that equipment with same id but different display name routes to ChangedEquipment.</summary>
     [Fact]
     public void Same_id_with_different_display_name_routes_to_ChangedEquipment()
     {
@@ -79,6 +84,7 @@ public sealed class Phase7PlannerTests
         plan.RemovedEquipment.ShouldBeEmpty();
     }
 
+    /// <summary>Verifies that driver config changes route to ChangedDrivers.</summary>
     [Fact]
     public void Driver_config_change_routes_to_ChangedDrivers()
     {
@@ -96,6 +102,7 @@ public sealed class Phase7PlannerTests
         plan.ChangedDrivers.Single().Current.ConfigJson.ShouldContain("new");
     }
 
+    /// <summary>Verifies that alarm message template changes route to ChangedAlarms.</summary>
     [Fact]
     public void Alarm_message_template_change_routes_to_ChangedAlarms()
     {
@@ -113,6 +120,7 @@ public sealed class Phase7PlannerTests
         plan.ChangedAlarms.Single().Current.MessageTemplate.ShouldBe("new");
     }
 
+    /// <summary>Verifies that added and removed lists are sorted by id for deterministic ordering.</summary>
     [Fact]
     public void Added_and_removed_lists_are_sorted_by_id_for_deterministic_ordering()
     {
@@ -127,6 +135,7 @@ public sealed class Phase7PlannerTests
         plan.RemovedEquipment.Select(e => e.EquipmentId).ShouldBe(new[] { "a", "z" });
     }
 
+    /// <summary>Verifies that mixed changes across all three classes are captured in one pass.</summary>
     [Fact]
     public void Mixed_changes_across_all_three_classes_are_captured_in_one_pass()
     {