docs(tests): fix CommentChecker findings across tests/ — 13,392 → 0 (repo-wide scan clean)

Comment/XML-doc changes only:
- add summaries to ~10k test methods, fixtures, fakes and helpers
  (+ <param> on theories, <returns> on async Task methods,
  <inheritdoc/> on interface implementations the checker can resolve)
- strip ~2.6k project-tracking references (WP*, P*-*, row-NN, Task N,
  #NN, Component-0NN) from comments, keeping the explanatory text;
  reword false positives in comments only
- real docs on fakes implementing BCL/library interfaces
  (IDisposable, ILogger, IOptionsMonitor, IAsyncLifetime)
- reword the last 5 src/ false positives (CWE-1236, failures-1,
  year-0001, M365)

Only non-comment edits: four one-line nested classes split across lines
so members can carry docs. Build 0 errors / 0 warnings.

tests/ZB.MOM.WW.ScadaBridge.DataConnectionLayer.Tests/Adapters/MxGatewayDataConnectionTests.cs

@@ -25,8 +25,10 @@ public class MxGatewayDataConnectionTests
         ["ReadTimeoutMs"] = "2000",
     };
 
-    // ── Task 6: connect / status / Disconnected ──
+    // ── connect / status / Disconnected ──
 
+    /// <summary>Verifies that connecting resolves the options and sets the status to connected.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task ConnectAsync_resolves_options_and_sets_status_connected()
     {
@@ -42,6 +44,8 @@ public class MxGatewayDataConnectionTests
         Assert.Equal(7, fake.ConnectedWith.WriteUserId);
     }
 
+    /// <summary>Verifies that connecting with a blank client name defaults it to scadabridge.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task ConnectAsync_blank_client_name_defaults_to_scadabridge()
     {
@@ -55,6 +59,8 @@ public class MxGatewayDataConnectionTests
         Assert.Equal("scadabridge", fake.ConnectedWith!.ClientName);
     }
 
+    /// <summary>Verifies that the Disconnected event fires exactly once when the event loop faults.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Disconnected_fires_exactly_once_when_event_loop_faults()
     {
@@ -74,8 +80,10 @@ public class MxGatewayDataConnectionTests
         Assert.Equal(ConnectionHealth.Disconnected, adapter.Status);
     }
 
-    // ── Task 7: subscribe / unsubscribe + event routing ──
+    // ── subscribe / unsubscribe + event routing ──
 
+    /// <summary>Verifies that an update to a subscribed tag invokes the callback with a mapped tag value.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Subscribed_tag_update_invokes_callback_with_mapped_TagValue()
     {
@@ -97,6 +105,8 @@ public class MxGatewayDataConnectionTests
         Assert.Equal(ts, received.Timestamp);
     }
 
+    /// <summary>Verifies that unsubscribing stops routing updates to the callback.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Unsubscribe_stops_routing_updates()
     {
@@ -115,8 +125,10 @@ public class MxGatewayDataConnectionTests
         Assert.Contains(subId, fake.Unsubscribed);
     }
 
-    // ── Task 8: read / write + error classification ──
+    // ── read / write + error classification ──
 
+    /// <summary>Verifies that a read maps both success and failure results.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task ReadAsync_maps_success_and_failure()
     {
@@ -138,6 +150,8 @@ public class MxGatewayDataConnectionTests
         Assert.Equal("bad tag", bad.ErrorMessage);
     }
 
+    /// <summary>Verifies that a batch read returns a dictionary keyed by tag.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task ReadBatchAsync_returns_dictionary_keyed_by_tag()
     {
@@ -154,6 +168,8 @@ public class MxGatewayDataConnectionTests
         Assert.Equal(3, results["bbb"].Value!.Value);
     }
 
+    /// <summary>Verifies that a failed write is mapped to an unsuccessful write result.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task WriteAsync_maps_failure_to_unsuccessful_WriteResult()
     {
@@ -170,8 +186,10 @@ public class MxGatewayDataConnectionTests
         Assert.Equal("rejected", r.ErrorMessage);
     }
 
-    // ── Task 9: WriteBatchAndWait ──
+    // ── WriteBatchAndWait ──
 
+    /// <summary>Verifies that a batch write and wait returns true when the response value matches.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task WriteBatchAndWait_returns_true_when_response_matches()
     {
@@ -200,6 +218,8 @@ public class MxGatewayDataConnectionTests
         Assert.Contains("Flag", writeCalls);
     }
 
+    /// <summary>Verifies that a batch write and wait returns false on timeout.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task WriteBatchAndWait_returns_false_on_timeout()
     {
@@ -219,8 +239,10 @@ public class MxGatewayDataConnectionTests
         Assert.False(ok);
     }
 
-    // ── Task 10: browse ──
+    // ── browse ──
 
+    /// <summary>Verifies that browsing children maps the children and the truncated flag.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task BrowseChildrenAsync_maps_children_and_truncated()
     {
@@ -245,6 +267,8 @@ public class MxGatewayDataConnectionTests
         Assert.Equal(BrowseNodeClass.Variable, result.Children[1].NodeClass);
     }
 
+    /// <summary>Verifies that browsing children surfaces the attribute data type.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task BrowseChildrenAsync_surfaces_attribute_datatype()
     {
@@ -263,6 +287,8 @@ public class MxGatewayDataConnectionTests
         Assert.Equal("Double", result.Children[0].DataType);
     }
 
+    /// <summary>Verifies that browsing children throws when the connection is not established.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task BrowseChildrenAsync_throws_when_not_connected()
     {