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.Host.Tests/StartupRetryTests.cs

@@ -3,12 +3,14 @@ using Microsoft.Extensions.Logging.Abstractions;
 namespace ZB.MOM.WW.ScadaBridge.Host.Tests;
 
 /// <summary>
-/// Host-010: startup preconditions (database migration) must tolerate a database
+/// Startup preconditions (database migration) must tolerate a database
 /// that is briefly unavailable at boot — common when an app container and its DB
 /// container start together — via a bounded retry with backoff.
 /// </summary>
 public class StartupRetryTests
 {
+    /// <summary>Verifies that an operation that succeeds on the first try runs exactly once.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task ExecuteWithRetry_SucceedsFirstTry_RunsOnce()
     {
@@ -23,6 +25,8 @@ public class StartupRetryTests
         Assert.Equal(1, attempts);
     }
 
+    /// <summary>Verifies that transient failures are retried until the operation succeeds.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task ExecuteWithRetry_TransientFailures_RetriesUntilSuccess()
     {
@@ -43,6 +47,8 @@ public class StartupRetryTests
         Assert.Equal(3, attempts);
     }
 
+    /// <summary>Verifies that exhausting all attempts rethrows the last exception.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task ExecuteWithRetry_ExhaustsAttempts_RethrowsLastException()
     {
@@ -64,10 +70,12 @@ public class StartupRetryTests
         Assert.Equal("failure 3", ex.Message);
     }
 
+    /// <summary>Verifies that a non-transient failure is rethrown after a single attempt.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task ExecuteWithRetry_NonTransientFailure_RethrowsAfterSingleAttempt()
     {
-        // Host-015: a permanent failure (e.g. a schema-version mismatch) must NOT be
+        // A permanent failure (e.g. a schema-version mismatch) must NOT be
         // retried — retrying it cannot succeed and only delays the fatal exit by
         // minutes. The isTransient predicate classifies it as non-retryable, so the
         // operation runs exactly once before the exception propagates.
@@ -89,6 +97,8 @@ public class StartupRetryTests
         Assert.Equal("permanent schema mismatch", ex.Message);
     }
 
+    /// <summary>Verifies that a transient failure followed by a permanent one stops at the permanent failure.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task ExecuteWithRetry_TransientThenPermanent_StopsAtPermanent()
     {