def validate_host(cls, v: str) -> str:
        """Validate that the host URL starts with http:// or https://."""
        if not v.startswith(("http://", "https://")):
            raise ValueError("Host must start with http:// or https://")
        return v
Validate that the host URL starts with http:// or https://.
backend/airweave/platform/configs/auth.py