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Anso
27660f622b
Hardens the scan-policy and CVE-suppression replication channel as the foundation of a multi-PR fleet sync hardening track. No new endpoints, no new tables, no schema changes; receivers still tolerate legacy payloads (absent pushedAt and controlIdentity) for rollout safety. Wire protocol: - Sender stamps every push with a strictly-increasing pushedAt and a placeholder controlIdentity. Receiver rejects strictly-older pushedAt with 409 STALE_SYNC_PUSH so the next write retries. - pushedAt comparison plus row replacement plus watermark write run in a single SQLite transaction; a partial-write window cannot leave the watermark behind the row state. Concurrency and limits: - Per-node mutex on the sender so concurrent control writes serialize per remote and never apply older state on top of newer. - Sender-side row cap at MAX_SYNC_ROWS=5000 with a 6-hour throttled truncation alert so flapping configs cannot flood the operator. - Route-level body limit raised to 5MB on POST /api/fleet/sync/:resource only; the global 100KB cap is unchanged. Oversize bodies return a structured 413 SYNC_PAYLOAD_TOO_LARGE. Determinism and hygiene: - getMatchingPolicy gains an id-ASC tiebreaker so two replicas resolve the same winner when policies tie on scope class. - Inline comment documents why getMatchingPolicy filters node_id at SQL yet still relies on JS identity matching for replicated rows. - Comment on the receive endpoint documents why no requirePaid is enforced (control's tier authorizes; replica trusts the bearer). - STALE_SYNC_PUSH 409s no longer record a node failure; they are expected protocol outcomes, not health issues. Public surface additions: - DatabaseService.transaction(fn): generic SAVEPOINT-friendly wrapper. - DatabaseService.getLocalScanPolicies / getLocalCveSuppressions: SQL filter on replicated_from_control = 0. - StaleSyncPushError: typed sentinel the route translates to 409. - fleetSyncConstants: shared MAX_SYNC_ROWS, body limit, state-key and error-code maps so the wire protocol has one source of truth. Tests: - 24 new vitest cases across fleet-sync-service, fleet-sync-routes, and database-matching-policy covering monotonic pushedAt, per-node serialization, row truncation and throttle, stale-push suppression, receiver back-compat, oversize-body 413, deterministic matching. - Full backend suite: 1757 pass / 5 skipped.