-- 222_processing_queue_stage_markdown.sql
-- Phase 1B: process_stage enum 에 'markdown' 추가.
-- plan: ~/.claude/plans/plan-idempotent-sundae.md (Phase 1B Round 5)
--
-- marker_worker 가 소비할 stage. classify_worker 완료 시 enqueue.
-- 단일 statement (asyncpg exec_driver_sql 제약, feedback_migration_runner_single_statement).

ALTER TYPE process_stage ADD VALUE IF NOT EXISTS 'markdown';
