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

tests/CBDD.Tests/DictionaryPageTests.cs

@@ -9,6 +9,9 @@ public class DictionaryPageTests
 {
     private const int PageSize = 16384;
 
+    /// <summary>
+    /// Verifies dictionary page initialization sets expected defaults.
+    /// </summary>
     [Fact]
     public void Initialize_ShouldSetupEmptyPage()
     {
@@ -26,6 +29,9 @@ public class DictionaryPageTests
         freeSpaceEnd.ShouldBe((ushort)PageSize);
     }
 
+    /// <summary>
+    /// Verifies insert adds entries and keeps them ordered.
+    /// </summary>
     [Fact]
     public void Insert_ShouldAddEntryAndSort()
     {
@@ -58,6 +64,9 @@ public class DictionaryPageTests
         entries[2].Value.ShouldBe((ushort)30);
     }
 
+    /// <summary>
+    /// Verifies key lookup returns the expected value.
+    /// </summary>
     [Fact]
     public void TryFind_ShouldReturnCorrectValue()
     {
@@ -76,6 +85,9 @@ public class DictionaryPageTests
         found.ShouldBeFalse();
     }
 
+    /// <summary>
+    /// Verifies inserts fail when the page is full.
+    /// </summary>
     [Fact]
     public void Overflow_ShouldReturnFalse_WhenFull()
     {
@@ -105,6 +117,9 @@ public class DictionaryPageTests
         inserted.ShouldBeFalse();
     }
 
+    /// <summary>
+    /// Verifies global lookup finds keys across chained dictionary pages.
+    /// </summary>
     [Fact]
     public void Chaining_ShouldFindKeysInLinkedPages()
     {
@@ -158,6 +173,9 @@ public class DictionaryPageTests
         if (File.Exists(Path.ChangeExtension(dbPath, ".wal"))) File.Delete(Path.ChangeExtension(dbPath, ".wal"));
     }
 
+    /// <summary>
+    /// Verifies global enumeration returns keys across chained dictionary pages.
+    /// </summary>
     [Fact]
     public void FindAllGlobal_ShouldRetrieveAllKeys()
     {