改造配置文件，去掉敏感信息

app/config.py

@@ -53,6 +53,16 @@ class Settings(BaseSettings):
     log_format: str = "%(asctime)s - %(name)s - %(levelname)s - %(message)s"
     log_date_format: str = "%Y-%m-%d %H:%M:%S"
 
+    # API配置
+    _api_authorization_token: str = ""  # 内部存储API Authorization Token
+    
+    @property
+    def api_authorization_token(self) -> str:
+        """API Authorization Token - 只在生产环境下返回"""
+        if self.environment.lower() == "production":
+            return self._api_authorization_token
+        return ""
+
     # 应用配置
     app_name: str = "AI Talk Callback API"
     environment: str = "production"  # 环境: production, test, development