Release v4928.1.4.2 stable

migrations/004_outbox_safety.sql

@@ -0,0 +1,12 @@
+-- ClientFlow v4 migration 004: stronger outbox idempotency and state visibility.
+ALTER TABLE integration_outbox ADD COLUMN IF NOT EXISTS locked_at TIMESTAMPTZ;
+ALTER TABLE integration_outbox ADD COLUMN IF NOT EXISTS lock_owner TEXT;
+ALTER TABLE integration_outbox ADD COLUMN IF NOT EXISTS ignored_at TIMESTAMPTZ;
+
+CREATE UNIQUE INDEX IF NOT EXISTS ux_integration_outbox_idempotency_key
+ON integration_outbox(idempotency_key)
+WHERE idempotency_key IS NOT NULL;
+
+CREATE INDEX IF NOT EXISTS idx_integration_outbox_pending_dispatch
+ON integration_outbox(target_system, created_at)
+WHERE status = 'pending';