Fix raise statement indentation in exception handler

src/llm_router.py

@@ -166,8 +166,8 @@ class LLMRouter:
                 
         except Exception as e:
             logger.error(f"Error calling Novita AI API: {e}", exc_info=True)
-                        raise
-            
+            raise
+    
     def _calculate_safe_max_tokens(self, prompt: str, requested_max_tokens: int) -> int:
         """
         Calculate safe max_tokens based on input token count and model context window.