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.ConfigurationDatabase.Tests/Repositories/AuditPurgeBudgetTests.cs

@@ -9,6 +9,8 @@ namespace ZB.MOM.WW.ScadaBridge.ConfigurationDatabase.Tests.Repositories;
 
 public class AuditPurgeBudgetTests
 {
+    /// <summary>Verifies that a backlogged channel purge stops at the row budget, including a partial final batch.</summary>
+    /// <returns>A task that represents the asynchronous operation.</returns>
     [Fact]
     public async Task BackloggedChannel_StopsAtBudgetIncludingPartialFinalBatch()
     {
@@ -24,32 +26,53 @@ public class AuditPurgeBudgetTests
 
     private sealed class BackloggedConnection : DbConnection
     {
+        /// <summary>Gets the batch sizes requested by the purge, in order.</summary>
         public List<int> RequestedBatches { get; } = new();
         private ConnectionState _state;
+        /// <inheritdoc />
         [AllowNull] public override string ConnectionString { get; set; } = "Server=localhost;Database=test";
+        /// <inheritdoc />
         public override string Database => "test";
+        /// <inheritdoc />
         public override string DataSource => "localhost";
+        /// <inheritdoc />
         public override string ServerVersion => "16.0";
+        /// <inheritdoc />
         public override ConnectionState State => _state;
+        /// <inheritdoc />
         public override void Open() => _state = ConnectionState.Open;
+        /// <inheritdoc />
         public override void Close() => _state = ConnectionState.Closed;
+        /// <inheritdoc />
         public override void ChangeDatabase(string databaseName) => throw new NotSupportedException();
+        /// <inheritdoc />
         protected override DbTransaction BeginDbTransaction(IsolationLevel isolationLevel) => throw new NotSupportedException();
+        /// <inheritdoc />
         protected override DbCommand CreateDbCommand() => new BackloggedCommand(this);
     }
 
     private sealed class BackloggedCommand(BackloggedConnection owner) : DbCommand
     {
         private readonly SqlCommand _parameters = new();
+        /// <inheritdoc />
         [AllowNull] public override string CommandText { get; set; } = "";
+        /// <inheritdoc />
         public override int CommandTimeout { get; set; }
+        /// <inheritdoc />
         public override CommandType CommandType { get; set; }
+        /// <inheritdoc />
         public override bool DesignTimeVisible { get; set; }
+        /// <inheritdoc />
         public override UpdateRowSource UpdatedRowSource { get; set; }
+        /// <inheritdoc />
         protected override DbConnection? DbConnection { get; set; }
+        /// <inheritdoc />
         protected override DbTransaction? DbTransaction { get; set; }
+        /// <inheritdoc />
         protected override DbParameterCollection DbParameterCollection => _parameters.Parameters;
+        /// <inheritdoc />
         protected override DbParameter CreateDbParameter() => new SqlParameter();
+        /// <inheritdoc />
         public override int ExecuteNonQuery()
         {
             // A server with more eligible rows than any tick is allowed to delete.
@@ -60,10 +83,15 @@ public class AuditPurgeBudgetTests
             owner.RequestedBatches.Add(requested);
             return requested;
         }
+        /// <inheritdoc />
         public override object? ExecuteScalar() => throw new NotSupportedException();
+        /// <inheritdoc />
         protected override DbDataReader ExecuteDbDataReader(CommandBehavior behavior) => throw new NotSupportedException();
+        /// <inheritdoc />
         public override void Cancel() { }
+        /// <inheritdoc />
         public override void Prepare() { }
+        /// <inheritdoc />
         protected override void Dispose(bool disposing)
         {
             if (disposing) _parameters.Dispose();