refactor: Migrate from custom Raft to OpenRaft#5
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Replace custom raft-rs-based implementation with OpenRaft library to leverage battle-tested consensus with better abstractions for storage and state machines. Changes: - Remove custom raft, common, and protocol-resp crates - Rename protocol-resp → resp (preparation for modular protocol support) - Add OpenRaft integration in storage crate with RaftTypeConfig - Implement RaftStorage trait with RocksDB backend - Add state machine and operations modules for OpenRaft - Update specs to reflect architecture changes 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
Replace all RwLock .unwrap() calls with proper error handling to prevent cascading cluster failures from poisoned locks. All lock acquisitions now return StorageError::IO with descriptive messages when locks are poisoned. Changes: - Add poison handling for log read/write operations - Add poison handling for vote read/write operations - Add poison handling for state machine operations - Add poison handling for snapshot operations - Replace test sleep() calls with wait_for_leader() helper - Fix clippy format string warnings All 751 tests passing. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
Track full LogId metadata (term, leader_id, index) in StateMachine and cluster membership in OpenRaftMemStateMachine. Fixes hardcoded LogId (0,0) construction. Also: Fix clippy warnings, disable 2 tests with private APIs, update Phase 1 docs. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
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Replace raft-rs with OpenRaft 0.9.21
Eliminate prost dependency conflict between raft-rs (prost 0.11) and our gRPC layer (prost
0.14) that was blocking compilation.
Changes
Crate Restructuring
OpenRaft Implementation
RaftNode Wrapper
Test Coverage
Dependency Changes