CUBELinux-2
7ccb29aa6a
- Add persist.rs: std-only NDJSON snapshot of the HashBackend store (no serde) for the durable checkpoint + load_into_store replay. - Add store.rs: ConcurrentStore = Mutex<HashBackend> live store + WAL (newline-delimited JSON, group-commit fsync, idempotent seq-numbered replay) + durable JSON checkpoint + bg flusher + startup replay. - Recovery events (checkpoint failure, WAL fsync failure, WAL replay) are written to a recovery.ndjson you asked to keep as the written backup log, so any fall-back to JSON is recorded 'in writing'. - Refactor cube-server to thread-per-connection over ConcurrentStore. - query_doc_type / scan_prefix / linked_to / delete_raw added. Verified: ./check (fmt, 7 unit tests, clippy -D warnings) all green; ./check stress drove 22,080 prog+run pairs (~368/s) over 60s, daemon survived, latency prog~9us/run~13us mean.