fix: resolve all 55 identified bugs across the codebase
Comprehensive bug fix pass across all subsystems:
- Critical: lexer infinite loop, WAL lock discipline, checkpoint safety,
compaction verification, HMAC key truncation, healthCheck leak
- High: MVCC lock safety, B-Tree delete rebalancing, Raft stale term
handling, replication socket leaks and ack cleanup, sharding migration
with old assignments, 2PC recovery, JWT/SCRAM auth fixes, wire protocol
bounds checks
- Medium: config error handling, MERGE parser completeness, IR/codegen
correctness, UDF bounds checks, LIMIT cost accuracy, mmap safety
- Low: timeout handling, float parsing edge cases, uint32 truncation,
cache entry cleanup
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
dimgigov
2d310a33a1