-- Additive: keep canonical queues, shared events and actual time entries.
ALTER TABLE planner_queue_versions ADD COLUMN IF NOT EXISTS desk_manual_order BOOLEAN NOT NULL DEFAULT FALSE;
DO $$ BEGIN
 IF NOT EXISTS (SELECT 1 FROM information_schema.columns
   WHERE table_schema=current_schema() AND table_name='sag_case_assignees' AND column_name='desk_seen_at') THEN
  ALTER TABLE sag_case_assignees ADD COLUMN desk_seen_at TIMESTAMPTZ;
  -- Existing assignments are known; only subsequent assignments enter the inbox.
  UPDATE sag_case_assignees SET desk_seen_at=assigned_at AT TIME ZONE 'UTC';
 END IF;
END $$;
ALTER TABLE tmodule_times ADD COLUMN IF NOT EXISTS planner_event_id BIGINT REFERENCES planner_events(id);
CREATE UNIQUE INDEX IF NOT EXISTS tmodule_event_participant_once
 ON tmodule_times(planner_event_id,medarbejder_id) WHERE planner_event_id IS NOT NULL;