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/StubOpcUaClientSearchTests.cs

@@ -4,7 +4,7 @@ using ZB.MOM.WW.ScadaBridge.DataConnectionLayer.Adapters;
 namespace ZB.MOM.WW.ScadaBridge.DataConnectionLayer.Tests;
 
 /// <summary>
-/// M7-B4 (T15): <see cref="StubOpcUaClient"/> searches its canned address-space
+/// <see cref="StubOpcUaClient"/> searches its canned address-space
 /// tree (root → Folder1/Folder2; Folder1 → Tag1/Tag2) so DCL address-space
 /// search flows can be exercised without a live OPC UA server. The stub fakes
 /// BrowseNext continuation paging on <c>Folder1</c>, so finding both Tag1 and
@@ -21,6 +21,8 @@ public class StubOpcUaClientSearchTests
         return client;
     }
 
+    /// <summary>Verifies that search tag finds both tags with root relative paths.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Search_Tag_FindsBothTags_WithRootRelativePaths()
     {
@@ -36,6 +38,8 @@ public class StubOpcUaClientSearchTests
         Assert.All(result.Matches, m => Assert.Contains("Tag", m.Node.DisplayName));
     }
 
+    /// <summary>Verifies that search folder matches on display name and path.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Search_Folder_MatchesOnDisplayNameAndPath()
     {
@@ -51,6 +55,8 @@ public class StubOpcUaClientSearchTests
         Assert.Equal(new[] { "/Folder1", "/Folder1/Tag1", "/Folder1/Tag2", "/Folder2" }, paths);
     }
 
+    /// <summary>Verifies that search folder 2 matches only the folder by display name.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Search_Folder2_MatchesOnlyTheFolderByDisplayName()
     {
@@ -66,6 +72,8 @@ public class StubOpcUaClientSearchTests
         Assert.Equal("Folder2", only.Node.DisplayName);
     }
 
+    /// <summary>Verifies that search is case insensitive.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Search_IsCaseInsensitive()
     {
@@ -76,6 +84,8 @@ public class StubOpcUaClientSearchTests
         Assert.Equal(2, result.Matches.Count);
     }
 
+    /// <summary>Verifies that search max results one stops early with cap reached.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Search_MaxResultsOne_StopsEarly_WithCapReached()
     {
@@ -88,6 +98,8 @@ public class StubOpcUaClientSearchTests
         Assert.Contains("Tag", only.Node.DisplayName);
     }
 
+    /// <summary>Verifies that search empty query returns no matches.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Search_EmptyQuery_ReturnsNoMatches()
     {
@@ -99,6 +111,8 @@ public class StubOpcUaClientSearchTests
         Assert.False(result.CapReached);
     }
 
+    /// <summary>Verifies that search whitespace query returns no matches.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task Search_WhitespaceQuery_ReturnsNoMatches()
     {