fix: auto-fix code issues (cron)

- 修复重复导入/字段
- 修复异常处理
- 修复PEP8格式问题
- 添加类型注解

backend/tingwu_client.py

@@ -19,7 +19,7 @@ class TingwuClient:
             raise ValueError("ALI_ACCESS_KEY and ALI_SECRET_KEY required")
 
     def _sign_request(
-        self, method: str, uri: str, query: str = "", body: str = ""
+        self, method: str, uri: str, query: str = "", body: str = "",
     ) -> dict[str, str]:
         """阿里云签名 V3"""
         timestamp = datetime.utcnow().strftime("%Y-%m-%dT%H:%M:%SZ")
@@ -43,7 +43,7 @@ class TingwuClient:
             from alibabacloud_tingwu20230930.client import Client as TingwuSDKClient
 
             config = open_api_models.Config(
-                access_key_id=self.access_key, access_key_secret=self.secret_key
+                access_key_id=self.access_key, access_key_secret=self.secret_key,
             )
             config.endpoint = "tingwu.cn-beijing.aliyuncs.com"
             client = TingwuSDKClient(config)
@@ -53,8 +53,8 @@ class TingwuClient:
                 input=tingwu_models.Input(source="OSS", file_url=audio_url),
                 parameters=tingwu_models.Parameters(
                     transcription=tingwu_models.Transcription(
-                        diarization_enabled=True, sentence_max_length=20
-                    )
+                        diarization_enabled=True, sentence_max_length=20,
+                    ),
                 ),
             )
 
@@ -73,7 +73,7 @@ class TingwuClient:
             return f"mock_task_{int(time.time())}"
 
     def get_task_result(
-        self, task_id: str, max_retries: int = 60, interval: int = 5
+        self, task_id: str, max_retries: int = 60, interval: int = 5,
     ) -> dict[str, Any]:
         """获取任务结果"""
         try:
@@ -83,7 +83,7 @@ class TingwuClient:
             from alibabacloud_tingwu20230930.client import Client as TingwuSDKClient
 
             config = open_api_models.Config(
-                access_key_id=self.access_key, access_key_secret=self.secret_key
+                access_key_id=self.access_key, access_key_secret=self.secret_key,
             )
             config.endpoint = "tingwu.cn-beijing.aliyuncs.com"
             client = TingwuSDKClient(config)
@@ -134,7 +134,7 @@ class TingwuClient:
                         "end": sent.end_time / 1000,
                         "text": sent.text,
                         "speaker": f"Speaker {sent.speaker_id}",
-                    }
+                    },
                 )
 
         return {"full_text": full_text.strip(), "segments": segments}
@@ -149,7 +149,7 @@ class TingwuClient:
                     "end": 5.0,
                     "text": "这是一个示例转录文本，包含 Project Alpha 和 K8s 等术语。",
                     "speaker": "Speaker A",
-                }
+                },
             ],
         }