Refactor locking script interface with sibispy.cli
Refactor locking script interface with sibispy.cli

This change makes `--event` explicitly required; previously, that
requirement was only implicit, since all logic in
exec_redcap_locking_data was looping on `args.event`.

sibis-platform/sibispy,sibis-platform/sibispy,sibis-platform/sibis,sibis-platform/sibis