Run the ~300 ILM policy PUTs concurrently (bounded to 10 in flight via a
throttle gate) instead of one serial curl per policy. Adds a put_policy
helper and waits for all background jobs before exiting. Preserves policy
parity; only the scheduling changes. Drops the dead empty sid cookie arg
(falls back to basic auth from curl.config as before).
Josh Patterson
780d9faf0d