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/ScriptedAlarms/ScriptedAlarmActorTests.cs

@@ -14,6 +14,7 @@ namespace ZB.MOM.WW.OtOpcUa.Runtime.Tests.ScriptedAlarms;
 
 public sealed class ScriptedAlarmActorTests : RuntimeActorTestBase
 {
+    /// <summary>Verifies that full state cycle publishes StateChanged messages to parent at each transition.</summary>
     [Fact]
     public void Full_state_cycle_publishes_StateChanged_to_parent_at_each_transition()
     {
@@ -33,6 +34,7 @@ public sealed class ScriptedAlarmActorTests : RuntimeActorTestBase
         t3.State.ShouldBe(ScriptedAlarmActorState.Inactive);
     }
 
+    /// <summary>Verifies that duplicate ConditionMet messages in Active state are ignored.</summary>
     [Fact]
     public void Duplicate_ConditionMet_in_Active_is_ignored()
     {
@@ -46,6 +48,7 @@ public sealed class ScriptedAlarmActorTests : RuntimeActorTestBase
         parent.ExpectNoMsg(TimeSpan.FromMilliseconds(200));
     }
 
+    /// <summary>Verifies that active transition publishes AlarmTransitionEvent to the alerts topic.</summary>
     [Fact]
     public void Engine_active_transition_publishes_AlarmTransitionEvent_to_alerts_topic()
     {
@@ -82,6 +85,7 @@ public sealed class ScriptedAlarmActorTests : RuntimeActorTestBase
         }, duration: TimeSpan.FromSeconds(1));
     }
 
+    /// <summary>Verifies that clear transition publishes Cleared event.</summary>
     [Fact]
     public void Engine_clear_transition_publishes_Cleared_event()
     {
@@ -107,6 +111,7 @@ public sealed class ScriptedAlarmActorTests : RuntimeActorTestBase
         }, duration: TimeSpan.FromSeconds(1));
     }
 
+    /// <summary>Verifies that manual acknowledge emits Acknowledged transition with the user.</summary>
     [Fact]
     public void Manual_acknowledge_emits_Acknowledged_transition_with_user()
     {
@@ -132,10 +137,16 @@ public sealed class ScriptedAlarmActorTests : RuntimeActorTestBase
         }, duration: TimeSpan.FromSeconds(1));
     }
 
+    /// <summary>A threshold-based alarm evaluator for testing.</summary>
     private sealed class ThresholdEvaluator : IScriptedAlarmEvaluator
     {
         private readonly double _threshold;
+
+        /// <summary>Initializes a new instance of the ThresholdEvaluator class.</summary>
+        /// <param name="threshold">The threshold value to compare against.</param>
         public ThresholdEvaluator(double threshold) { _threshold = threshold; }
+
+        /// <inheritdoc />
         public ScriptedAlarmEvalResult Evaluate(string id, string predicate, IReadOnlyDictionary<string, object?> deps)
         {
             if (!deps.TryGetValue("temp", out var raw) || raw is null)
@@ -144,10 +155,18 @@ public sealed class ScriptedAlarmActorTests : RuntimeActorTestBase
         }
     }
 
+    /// <summary>A test publisher that captures published messages.</summary>
     private sealed class CapturingPublisher
     {
+        /// <summary>Gets the topics that messages were published to.</summary>
         public ConcurrentBag<string> Topics { get; } = new();
+
+        /// <summary>Gets the payloads that were published.</summary>
         public ConcurrentBag<object> Payloads { get; } = new();
+
+        /// <summary>Publishes a message to the specified topic.</summary>
+        /// <param name="topic">The topic name.</param>
+        /// <param name="payload">The message payload.</param>
         public void Publish(string topic, object payload)
         {
             Topics.Add(topic);