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

tests/CBDD.Tests/InsertBulkTests.cs

@@ -13,17 +13,26 @@ public class InsertBulkTests : IDisposable
     private readonly string _testFile;
     private readonly Shared.TestDbContext _db;
 
+    /// <summary>
+    /// Initializes a new instance of the <see cref="InsertBulkTests"/> class.
+    /// </summary>
     public InsertBulkTests()
     {
         _testFile = Path.GetTempFileName();
         _db = new Shared.TestDbContext(_testFile);
     }
 
+    /// <summary>
+    /// Disposes test resources.
+    /// </summary>
     public void Dispose()
     {
         _db.Dispose();
     }
 
+    /// <summary>
+    /// Verifies bulk inserts are immediately persisted and visible.
+    /// </summary>
     [Fact]
     public void InsertBulk_PersistsData_ImmediatelyVisible()
     {
@@ -41,6 +50,9 @@ public class InsertBulkTests : IDisposable
         insertedUsers.Count.ShouldBe(50);
     }
 
+    /// <summary>
+    /// Verifies bulk inserts spanning multiple pages persist correctly.
+    /// </summary>
     [Fact]
     public void InsertBulk_SpanningMultiplePages_PersistsCorrectly()
     {