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

tests/CBDD.Tests/CompressionCorruptionTests.cs

@@ -9,6 +9,9 @@ namespace ZB.MOM.WW.CBDD.Tests;
 
 public class CompressionCorruptionTests
 {
+    /// <summary>
+    /// Verifies corrupted compressed payload checksum triggers invalid data errors.
+    /// </summary>
     [Fact]
     public void Read_WithBadChecksum_ShouldThrowInvalidData()
     {
@@ -34,6 +37,9 @@ public class CompressionCorruptionTests
         }
     }
 
+    /// <summary>
+    /// Verifies invalid original length metadata triggers invalid data errors.
+    /// </summary>
     [Fact]
     public void Read_WithBadOriginalLength_ShouldThrowInvalidData()
     {
@@ -57,6 +63,9 @@ public class CompressionCorruptionTests
         }
     }
 
+    /// <summary>
+    /// Verifies oversized declared decompressed length enforces safety guardrails.
+    /// </summary>
     [Fact]
     public void Read_WithOversizedDeclaredLength_ShouldEnforceGuardrail()
     {
@@ -81,6 +90,9 @@ public class CompressionCorruptionTests
         }
     }
 
+    /// <summary>
+    /// Verifies invalid codec identifiers in compressed headers trigger invalid data errors.
+    /// </summary>
     [Fact]
     public void Read_WithInvalidCodecId_ShouldThrowInvalidData()
     {