-- 002_followups.sql -- follow-up rules + interview prep on application

ALTER TABLE application
    ADD COLUMN IF NOT EXISTS follow_up_after_days int NOT NULL DEFAULT 7,
    ADD COLUMN IF NOT EXISTS last_activity_at timestamptz NOT NULL DEFAULT now(),
    ADD COLUMN IF NOT EXISTS follow_up_snoozed_until date,
    ADD COLUMN IF NOT EXISTS interview_prep_artifact_id uuid REFERENCES artifact(id);

-- last_activity_at defaults to created_at for existing rows
UPDATE application
SET last_activity_at = created_at
WHERE last_activity_at IS NULL;