Fix audit findings for coverage, architecture checks, and XML docs

tests/CBDD.Tests.Benchmark/CompactionBenchmarks.cs

@@ -15,6 +15,9 @@ namespace ZB.MOM.WW.CBDD.Tests.Benchmark;
 [JsonExporterAttribute.Full]
 public class CompactionBenchmarks
 {
+    /// <summary>
+    /// Gets or sets the number of documents used per benchmark iteration.
+    /// </summary>
     [Params(2_000)]
     public int DocumentCount { get; set; }
 
@@ -25,6 +28,9 @@ public class CompactionBenchmarks
     private DocumentCollection<Person> _collection = null!;
     private List<ObjectId> _insertedIds = [];
 
+    /// <summary>
+    /// Prepares benchmark state and seed data for each iteration.
+    /// </summary>
     [IterationSetup]
     public void Setup()
     {
@@ -56,6 +62,9 @@ public class CompactionBenchmarks
         _storage.Checkpoint();
     }
 
+    /// <summary>
+    /// Cleans up benchmark resources and temporary files after each iteration.
+    /// </summary>
     [IterationCleanup]
     public void Cleanup()
     {
@@ -66,6 +75,10 @@ public class CompactionBenchmarks
         if (File.Exists(_walPath)) File.Delete(_walPath);
     }
 
+    /// <summary>
+    /// Benchmarks reclaimed file bytes reported by offline compaction.
+    /// </summary>
+    /// <returns>The reclaimed file byte count.</returns>
     [Benchmark(Baseline = true)]
     [BenchmarkCategory("Compaction_Offline")]
     public long OfflineCompact_ReclaimedBytes()
@@ -81,6 +94,10 @@ public class CompactionBenchmarks
         return stats.ReclaimedFileBytes;
     }
 
+    /// <summary>
+    /// Benchmarks tail bytes truncated by offline compaction.
+    /// </summary>
+    /// <returns>The truncated tail byte count.</returns>
     [Benchmark]
     [BenchmarkCategory("Compaction_Offline")]
     public long OfflineCompact_TailBytesTruncated()