Feature request: hook to observe retries in grpc retry

Feature request: hook to observe retries in grpc retry: a task in MiMo-V2.6-RL-oss: Agentic RL Environments (MiMo RL release). Feature request: hook to observe retries in grpc retry I'm using the retry interceptor from this package on a gRPC client and would like to react to retries from my own…