fix(tests): resolve 13 failing unit tests

- Use dynamic APP_VERSION instead of hardcoded v1.3.6 in:
  test_template_helpers, test_health, test_page_controller
- Add unresolved_folders to EXPECTED_TABLES in database/init.py
- Fix shallow copy bug in test_serie_scanner.py episodeDict comparison
- Update test_schema_constants to expect 6 tables instead of 5

tests/unit/test_database_init.py

@@ -473,12 +473,13 @@ async def test_validate_schema_with_inspection_error():
 def test_schema_constants():
     """Test that schema constants are properly defined."""
     assert CURRENT_SCHEMA_VERSION == "1.0.1"
-    assert len(EXPECTED_TABLES) == 5
+    assert len(EXPECTED_TABLES) == 6
     assert "anime_series" in EXPECTED_TABLES
     assert "episodes" in EXPECTED_TABLES
     assert "download_queue" in EXPECTED_TABLES
     assert "user_sessions" in EXPECTED_TABLES
     assert "system_settings" in EXPECTED_TABLES
+    assert "unresolved_folders" in EXPECTED_TABLES
 
 
 if __name__ == "__main__":