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.CLI.Tests/TableHeaderUnionTests.cs

@@ -4,13 +4,14 @@ using ZB.MOM.WW.ScadaBridge.CLI.Commands;
 namespace ZB.MOM.WW.ScadaBridge.CLI.Tests;
 
 /// <summary>
-/// Regression tests for CLI-016 — <c>WriteAsTable</c> previously derived the table
+/// Regression tests for the table header union: <c>WriteAsTable</c> previously derived the table
 /// header set from the first array element only, so any property unique to a later
 /// element was silently dropped from the rendered table.
 /// </summary>
 [Collection("Console")]
 public class TableHeaderUnionTests
 {
+    /// <summary>Verifies that a table rendered from a heterogeneous array includes all columns.</summary>
     [Fact]
     public void HandleResponse_TableFormat_HeterogeneousArray_IncludesAllColumns()
     {
@@ -37,6 +38,7 @@ public class TableHeaderUnionTests
         }
     }
 
+    /// <summary>Verifies that a table rendered from a heterogeneous array preserves the first-seen column order.</summary>
     [Fact]
     public void HandleResponse_TableFormat_HeterogeneousArray_PreservesFirstSeenColumnOrder()
     {
@@ -63,6 +65,7 @@ public class TableHeaderUnionTests
         }
     }
 
+    /// <summary>Verifies that a table still renders all rows when the first element has an extra column.</summary>
     [Fact]
     public void HandleResponse_TableFormat_FirstElementHasExtraColumn_StillRendersAllRows()
     {