Const ExperimentalUsually it represents an error code, but may also represent partial success, warning, or differentiate between various types of successful outcomes.
Semantic conventions for individual RPC frameworks SHOULD document what rpc.response.status_code means in the context of that system and which values are considered to represent errors.
This attribute is experimental and is subject to breaking changes in minor releases of @opentelemetry/semantic-conventions.
Status code of the RPC returned by the RPC server or generated by the client