START_IDEMPOTENCY_RUN_INDEX_DDL:"CREATE INDEX IF NOT EXISTS flowsafe_start_idempotency_run\n ON flowsafe_start_idempotency (run_id)" = ...
run_id is how the RUNTIME finds a reservation (terminal reconcile knows the
run, never the key) and how the purge pairs a reservation with the snapshot
it outlived. Without the index both degrade to a table scan on every terminal
run.
run_idis how the RUNTIME finds a reservation (terminal reconcile knows the run, never the key) and how the purge pairs a reservation with the snapshot it outlived. Without the index both degrade to a table scan on every terminal run.