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### Remove `cluster_id` Field from Protocol Buffers - **Removed `cluster_id` Field**: The `cluster_id` field has been removed from the `RequestHeader` and `ResponseHeader` messages across multiple langua bindings and source files. This includes updates to: - C++: `common.pb.cc`, `common.pb.h` - Go: `common.pb.go` - Java: `Common.java` - Proto: `common.proto` - Rust: `meta.rs` These changes streamline the protocol by eliminating the `cluster_id` field, simplifying the message structures and related logic.