Save text records to db

engine/app/config.py

@@ -91,6 +91,11 @@ class Settings(BaseSettings):
     ws_api_key: Optional[str] = Field(default=None, description="Optional API key required for WS hello auth")
     ws_require_auth: bool = Field(default=False, description="Require auth in hello message even when ws_api_key is not set")
 
+    # Backend bridge configuration (for call/transcript persistence)
+    backend_url: Optional[str] = Field(default=None, description="Backend API base URL (e.g. http://localhost:8787)")
+    backend_timeout_sec: int = Field(default=10, description="Backend API request timeout in seconds")
+    history_default_user_id: int = Field(default=1, description="Fallback user_id for history records")
+
     @property
     def chunk_size_bytes(self) -> int:
         """Calculate chunk size in bytes based on sample rate and duration."""