feat(deploy): production deployment setup and fixes
- Debian-based api image (bookworm-slim), docker/debian mirrors, prisma binaryTargets for openssl 3.0 - nginx: admin SPA under /admin, TLS via acme.sh (ZeroSSL) + auto-renewal cron, http->https redirect - prisma: add origin_goods.delisted migration, sync missing schema (good_image/tag_font_color/good_tags), fix users.createdAt Timestamptz - api: CORS wildcard reflection, helmet CORP cross-origin, price backfill in persistProductDetail, categoryIcon ancestor fallback, mediaByColor per-color gallery in public goods detail - admin: /admin base path (vite + router) - import-data.mjs: udt_name casting, serial sequence advance fix
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---
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title: Enable Row Level Security for Multi-Tenant Data
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impact: CRITICAL
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impactDescription: Database-enforced tenant isolation, prevent data leaks
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tags: rls, row-level-security, multi-tenant, security
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---
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## Enable Row Level Security for Multi-Tenant Data
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Row Level Security (RLS) enforces data access at the database level, ensuring users only see their own data.
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**Incorrect (application-level filtering only):**
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```sql
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-- Relying only on application to filter
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select * from orders where user_id = $current_user_id;
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-- Bug or bypass means all data is exposed!
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select * from orders; -- Returns ALL orders
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```
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**Correct (database-enforced RLS):**
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```sql
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-- Enable RLS on the table
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alter table orders enable row level security;
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-- Create policy for users to see only their orders
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create policy orders_user_policy on orders
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for all
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using (user_id = current_setting('app.current_user_id')::bigint);
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-- Force RLS even for table owners
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alter table orders force row level security;
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-- Set user context and query
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set app.current_user_id = '123';
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select * from orders; -- Only returns orders for user 123
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```
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Policy for authenticated role:
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```sql
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create policy orders_user_policy on orders
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for all
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to authenticated
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using (user_id = auth.uid());
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```
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Reference: [Row Level Security](https://supabase.com/docs/guides/database/postgres/row-level-security)
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