-- ulak 0.0.2 -> 0.0.3 upgrade migration
-- No schema changes. The worker partition algorithm changed in C code:
-- ordering_key messages are now hash-partitioned by hashtext(ordering_key)
-- instead of id-based modulo, restoring per-key FIFO guarantee in
-- multi-worker deployments. Existing pending messages continue to be
-- fetched correctly under the new algorithm.
SELECT 1;