Add tests for email endpoint and adjust exception handling

Added new test methods to the EmailEndpointTest to ensure comprehensive verification of email detail setting and document type checking. Also included the InvalidDocumentTypeException in the tests for more robust exception handling.

.github/workflows /tests.yml

@@ -2,9 +2,7 @@ name: Tests
 
 on:
   push:
-    branches:
-      - master
-      - '*.x'
+    branches: [ "master" ]
   pull_request:
 
 permissions: