feat(db): 고객 포털 — contact_requests 상태머신·토큰 + quotes FK

supabase/migrations/2026-06-12-client-portal.sql

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+-- 2026-06-12 Phase 3: 외주 고객 포털
+-- (1) contact_requests 확장
+ALTER TABLE contact_requests ADD COLUMN IF NOT EXISTS public_token text UNIQUE;
+ALTER TABLE contact_requests ADD COLUMN IF NOT EXISTS project_type text;
+ALTER TABLE contact_requests ADD COLUMN IF NOT EXISTS budget text;
+ALTER TABLE contact_requests ADD COLUMN IF NOT EXISTS timeline text;
+ALTER TABLE contact_requests ADD COLUMN IF NOT EXISTS updated_at timestamptz DEFAULT now();
+
+-- 기존 행 토큰 백필 (멱등 — NULL만)
+UPDATE contact_requests SET public_token = gen_random_uuid()::text WHERE public_token IS NULL;
+
+-- 상태 머신 CHECK (레거시 3종 포함 8종)
+ALTER TABLE contact_requests DROP CONSTRAINT IF EXISTS contact_requests_status_check;
+ALTER TABLE contact_requests ADD CONSTRAINT contact_requests_status_check
+  CHECK (status IN ('pending','reviewing','quoted','accepted','on_hold','in_progress','completed','cancelled'));
+
+-- (2) quotes ↔ contact_requests 연결
+ALTER TABLE quotes ADD COLUMN IF NOT EXISTS contact_request_id uuid REFERENCES contact_requests(id) ON DELETE SET NULL;
+CREATE INDEX IF NOT EXISTS idx_quotes_contact_request ON quotes (contact_request_id);
+
+-- (3) quotes.public_token 컬럼 보장 (live DB에 직접 생성된 경우 대비)
+ALTER TABLE quotes ADD COLUMN IF NOT EXISTS public_token text UNIQUE;
+
+-- quotes.public_token 기본값 보장
+ALTER TABLE quotes ALTER COLUMN public_token SET DEFAULT gen_random_uuid()::text;
+UPDATE quotes SET public_token = gen_random_uuid()::text WHERE public_token IS NULL;