cleans up tests

app/ai_service.py

@@ -288,7 +288,7 @@ Return the rules in JSON format:
         return " ".join(feedback)
     
     @staticmethod
-    def generate_cache_key(folder_name: str, folder_type: str, rule_type: str, raw_text: str) -> str:
+    def generate_cache_key(folder_name: str, folder_type: str, rule_type: str, raw_text: str = '') -> str:
         """Generate a cache key for AI rule requests."""
         key_string = f"{folder_name}:{folder_type}:{rule_type}:{raw_text}"
         return hashlib.md5(key_string.encode()).hexdigest()