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.DeploymentManager.Tests/DeploymentServiceStalenessTests.cs

@@ -89,13 +89,24 @@ public class DeploymentServiceStalenessTests
         /// <summary>Every entry logged, in order.</summary>
         public List<(LogLevel Level, string Message)> Entries { get; } = [];
 
-        /// <inheritdoc />
+        /// <summary>Begins a logical scope; this capturing logger does not track scopes.</summary>
+        /// <typeparam name="TState">The type of the scope state.</typeparam>
+        /// <param name="state">The scope state.</param>
+        /// <returns>Always <see langword="null"/>.</returns>
         public IDisposable? BeginScope<TState>(TState state) where TState : notnull => null;
 
-        /// <inheritdoc />
+        /// <summary>Reports whether a log level is enabled; every level is.</summary>
+        /// <param name="logLevel">The log level to check.</param>
+        /// <returns>Always <see langword="true"/>.</returns>
         public bool IsEnabled(LogLevel logLevel) => true;
 
-        /// <inheritdoc />
+        /// <summary>Records the level and formatted message in <see cref="Entries"/>.</summary>
+        /// <typeparam name="TState">The type of the log state.</typeparam>
+        /// <param name="logLevel">The severity of the entry.</param>
+        /// <param name="eventId">The event id of the entry.</param>
+        /// <param name="state">The log state.</param>
+        /// <param name="exception">The exception associated with the entry, if any.</param>
+        /// <param name="formatter">Formats the state and exception into the message.</param>
         public void Log<TState>(
             LogLevel logLevel,
             EventId eventId,
@@ -135,6 +146,8 @@ public class DeploymentServiceStalenessTests
         _repo.GetDeployedRevisionHashesAsync(Arg.Any<CancellationToken>())
             .Returns(rows.ToDictionary(r => r.InstanceId, r => r.Hash));
 
+    /// <summary>Verifies that the staleness check shares one flatten session across the whole batch.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task GetInstanceStalenessAsync_SharesOneSessionAcrossTheBatch()
     {
@@ -156,6 +169,8 @@ public class DeploymentServiceStalenessTests
         await _pipeline.Received(1).FlattenAndValidateAsync(3, Arg.Any<CancellationToken>(), false, _session);
     }
 
+    /// <summary>Verifies that a matching hash is reported as not stale and no snapshot is read.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task GetInstanceStalenessAsync_HashMatches_NotStaleAndNoSnapshotRead()
     {
@@ -172,6 +187,8 @@ public class DeploymentServiceStalenessTests
         await _repo.DidNotReceive().GetDeployedSnapshotByInstanceIdAsync(1, Arg.Any<CancellationToken>());
     }
 
+    /// <summary>Verifies that an old-form list snapshot is normalised to not stale.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task GetInstanceStalenessAsync_OldFormListSnapshot_NormalisesToNotStale()
     {
@@ -214,6 +231,8 @@ public class DeploymentServiceStalenessTests
         await _repo.Received(1).GetDeployedSnapshotByInstanceIdAsync(50, Arg.Any<CancellationToken>());
     }
 
+    /// <summary>Verifies that a genuine hash mismatch is reported as stale.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task GetInstanceStalenessAsync_GenuineMismatch_IsStale()
     {
@@ -231,6 +250,8 @@ public class DeploymentServiceStalenessTests
         Assert.True(result[1]);
     }
 
+    /// <summary>Verifies that a failing flatten is reported with unknown staleness.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task GetInstanceStalenessAsync_FlattenFails_ReportsUnknown()
     {
@@ -246,6 +267,8 @@ public class DeploymentServiceStalenessTests
         Assert.Null(result[1]);
     }
 
+    /// <summary>Verifies that many flatten failures log exactly one warning.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task GetInstanceStalenessAsync_ManyFlattenFailures_LogsExactlyOneWarning()
     {
@@ -274,6 +297,8 @@ public class DeploymentServiceStalenessTests
         Assert.Equal(2, _logger.Entries.Count(e => e.Level == LogLevel.Debug));
     }
 
+    /// <summary>Verifies that no flatten failures log no warning.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task GetInstanceStalenessAsync_NoFailures_LogsNoWarning()
     {
@@ -287,6 +312,8 @@ public class DeploymentServiceStalenessTests
         Assert.DoesNotContain(_logger.Entries, e => e.Level == LogLevel.Warning);
     }
 
+    /// <summary>Verifies that an instance without a snapshot is omitted from the result.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task GetInstanceStalenessAsync_InstanceWithoutSnapshot_IsOmitted()
     {
@@ -304,6 +331,8 @@ public class DeploymentServiceStalenessTests
             2, Arg.Any<CancellationToken>(), Arg.Any<bool>(), Arg.Any<FlattenSession?>());
     }
 
+    /// <summary>Verifies that an instance whose snapshot vanishes between reads is omitted from the result.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task GetInstanceStalenessAsync_SnapshotVanishedBetweenReads_IsOmitted()
     {
@@ -319,6 +348,8 @@ public class DeploymentServiceStalenessTests
         Assert.False(result.ContainsKey(1));
     }
 
+    /// <summary>Verifies that duplicate instance ids are flattened only once.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task GetInstanceStalenessAsync_DuplicateIds_FlattenedOnce()
     {
@@ -334,6 +365,8 @@ public class DeploymentServiceStalenessTests
             1, Arg.Any<CancellationToken>(), Arg.Any<bool>(), Arg.Any<FlattenSession?>());
     }
 
+    /// <summary>Verifies that empty input returns an empty result without any reads.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task GetInstanceStalenessAsync_EmptyInput_ReturnsEmptyWithoutReads()
     {