refactor: clean up gRPC dependencies and config references by whoAbhishekSah · Pull Request #1412 · raystack/frontier

coderabbitai[bot]

@whoAbhishekSah @claude

- Remove `port` and `grpc` section from sample config
- Update callback_urls to use ConnectRPC endpoint
- Update docker-compose ports: replace REST/gRPC with connect (8002) and metrics (9000)
- go mod tidy: remove gorilla/handlers, oklog/run; demote golang/protobuf and otelgrpc to indirect

Follow-up to #1404 which removed all gRPC server code.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

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