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.SiteEventLogging.Tests/SiteEventsSchemaCalibrationTests.cs

@@ -43,6 +43,7 @@ public class SiteEventsSchemaCalibrationTests
         return values;
     }
 
+    /// <summary>Verifies that the modelled columns exactly match the sampled octet-length sum.</summary>
     [Fact]
     public void Columns_MatchTheSampledOctetLengthSum_Exactly()
     {
@@ -59,6 +60,7 @@ public class SiteEventsSchemaCalibrationTests
             $"{RecalibrationNotice} Actual columns: {string.Join(", ", columns)}");
     }
 
+    /// <summary>Verifies that the table has exactly the four indexes the model charges for, plus the primary-key autoindex.</summary>
     [Fact]
     public void Indexes_AreExactlyTheFourTheModelCharges_PlusThePkAutoindex()
     {
@@ -82,6 +84,9 @@ public class SiteEventsSchemaCalibrationTests
             $"{RecalibrationNotice} Actual indexes: {string.Join(", ", indexes)}");
     }
 
+    /// <summary>Verifies that each index covers exactly the column the sampler sums.</summary>
+    /// <param name="indexName">The index name.</param>
+    /// <param name="expectedColumn">The column the index is expected to cover.</param>
     [Theory]
     [InlineData("idx_events_timestamp", "timestamp")]
     [InlineData("idx_events_type", "event_type")]