feat(cluster): add swim gossip protocol - #32
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implements binary encoding/decoding for SWIM gossip protocol messages: - GossipMessage enum: Ping, PingReq, Ack, Join, Welcome - NodeUpdate enum: Alive, Suspect, Dead, Left (piggybacked state) - MemberInfo struct for cluster membership data - compact binary format with little-endian integers - supports both ipv4 and ipv6 addresses includes roundtrip tests for all message types.
implements the core gossip protocol for failure detection: - GossipConfig: protocol timing and tuning parameters - GossipEngine: manages membership and failure detection - MemberState/MemberStatus: per-node health tracking - GossipEvent: events for member join/suspect/fail/leave protocol features: - periodic random probing (tick) - probe timeout -> suspect transition - suspicion timeout -> dead transition - incarnation numbers for refuting false suspicions - piggyback state updates on all messages includes tests for engine lifecycle and message handling.
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feat(cluster): add swim gossip protocol
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summary
implements the swim gossip protocol for cluster membership and failure detection (phase 4, week 11):
message.rs: binary wire format for gossip messages
gossip.rs: swim protocol engine
what was tested
cargo clippy -- -D warningspassescargo test --workspaceall 216 tests passdesign considerations