-- DentalCare 0.7.9.2
-- Clinical workflow completion and dead-end cleanup.
--
-- The authenticated updater performs the idempotent schema work because the
-- installation table prefix is runtime-configured. It adds:
--   clinical_encounters.assistant_decision ENUM('assigned','none') NULL
--   clinical_encounters.assistant_decided_by BIGINT UNSIGNED NULL
--   clinical_encounters.assistant_decided_at DATETIME NULL
-- Existing encounters are backfilled from the recorded assistant assignment.
-- No clinical, billing, queue, appointment, or inventory records are deleted.
