feat(packs-lab): Supabase pack_files DDL + 활성/삭제 인덱스

packs-lab/supabase/pack_files.sql

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+-- pack_files: NAS에 저장된 다운로드 가능한 패키지 파일 메타
+-- 운영 적용: Supabase Dashboard → SQL editor에서 실행
+create table if not exists public.pack_files (
+    id              uuid        primary key default gen_random_uuid(),
+    min_tier        text        not null check (min_tier in ('starter','pro','master')),
+    label           text        not null,
+    file_path       text        not null unique,
+    filename        text        not null,
+    size_bytes      bigint      not null check (size_bytes > 0),
+    sort_order      integer     not null default 0,
+    uploaded_at     timestamptz not null default now(),
+    deleted_at      timestamptz
+);
+
+-- list 라우트 hot path: deleted_at IS NULL + tier/order 정렬
+create index if not exists pack_files_active_idx
+    on public.pack_files (min_tier, sort_order)
+    where deleted_at is null;
+
+-- soft-deleted 통계 / cleanup 잡 대비
+create index if not exists pack_files_deleted_at_idx
+    on public.pack_files (deleted_at)
+    where deleted_at is not null;