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.Commons.Tests/Kpi/KpiSampleTests.cs

@@ -5,6 +5,7 @@ namespace ZB.MOM.WW.ScadaBridge.Commons.Tests.Kpi;
 
 public class KpiSampleTests
 {
+    /// <summary>Verifies that a KpiSample constructed with its required members round-trips the values.</summary>
     [Fact]
     public void KpiSample_ConstructedWithRequiredMembers_RoundTripsValues()
     {
@@ -31,6 +32,7 @@ public class KpiSampleTests
         Assert.Equal(DateTimeKind.Utc, sample.CapturedAtUtc.Kind);
     }
 
+    /// <summary>Verifies that a scoped sample carries its scope key.</summary>
     [Fact]
     public void KpiSample_ScopedSample_CarriesScopeKey()
     {
@@ -49,6 +51,7 @@ public class KpiSampleTests
         Assert.Equal(12.5, sample.Value);
     }
 
+    /// <summary>Verifies that each KPI scope and source constant equals its own name.</summary>
     [Fact]
     public void KpiScopesAndSources_ConstantValues_EqualTheirNames()
     {
@@ -62,6 +65,7 @@ public class KpiSampleTests
         Assert.Equal("Node", KpiScopes.Node);
     }
 
+    /// <summary>Verifies that KpiSeriesPoint is a value record struct with component-wise equality.</summary>
     [Fact]
     public void KpiSeriesPoint_IsValueRecordStruct_WithComponentEquality()
     {