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

tests/CBDD.Tests/LinqTests.cs

@@ -17,6 +17,9 @@ namespace ZB.MOM.WW.CBDD.Tests
         private readonly string _testFile;
         private readonly Shared.TestDbContext _db;
 
+        /// <summary>
+        /// Initializes a new instance of the <see cref="LinqTests"/> class.
+        /// </summary>
         public LinqTests()
         {
             _testFile = Path.Combine(Path.GetTempPath(), $"linq_tests_{Guid.NewGuid()}.db");
@@ -35,6 +38,9 @@ namespace ZB.MOM.WW.CBDD.Tests
             _db.SaveChanges();
         }
 
+        /// <summary>
+        /// Disposes test resources and removes temporary files.
+        /// </summary>
         public void Dispose()
         {
             _db.Dispose();
@@ -43,6 +49,9 @@ namespace ZB.MOM.WW.CBDD.Tests
             if (File.Exists(wal)) File.Delete(wal);
         }
 
+        /// <summary>
+        /// Verifies where filters return matching documents.
+        /// </summary>
         [Fact]
         public void Where_FiltersDocuments()
         {
@@ -53,6 +62,9 @@ namespace ZB.MOM.WW.CBDD.Tests
             results.ShouldNotContain(d => d.Name == "Bob");
         }
 
+        /// <summary>
+        /// Verifies order by returns sorted documents.
+        /// </summary>
         [Fact]
         public void OrderBy_SortsDocuments()
         {
@@ -64,6 +76,9 @@ namespace ZB.MOM.WW.CBDD.Tests
             results.Last().Name.ShouldBe("Eve"); // 40
         }
 
+        /// <summary>
+        /// Verifies skip and take support pagination.
+        /// </summary>
         [Fact]
         public void SkipTake_Pagination()
         {
@@ -78,6 +93,9 @@ namespace ZB.MOM.WW.CBDD.Tests
             results[1].Name.ShouldBe("Alice"); // 30
         }
 
+        /// <summary>
+        /// Verifies select supports projections.
+        /// </summary>
         [Fact]
         public void Select_Projections()
         {
@@ -91,6 +109,9 @@ namespace ZB.MOM.WW.CBDD.Tests
             names[0].ShouldBe("Dave");
             names[1].ShouldBe("Bob");
         }
+        /// <summary>
+        /// Verifies indexed where queries use index-backed filtering.
+        /// </summary>
         [Fact]
         public void IndexedWhere_UsedIndex()
         {
@@ -104,6 +125,9 @@ namespace ZB.MOM.WW.CBDD.Tests
             results.ShouldNotContain(d => d.Name == "Bob"); // Age 25 (filtered out by strict >)
             results.ShouldNotContain(d => d.Name == "Dave"); // Age 20
         }
+        /// <summary>
+        /// Verifies starts-with predicates can use an index.
+        /// </summary>
         [Fact]
         public void StartsWith_UsedIndex()
         {
@@ -118,6 +142,9 @@ namespace ZB.MOM.WW.CBDD.Tests
             results[0].Name.ShouldBe("Charlie");
         }
 
+        /// <summary>
+        /// Verifies range predicates can use an index.
+        /// </summary>
         [Fact]
         public void Between_UsedIndex()
         {