feat: enhance roadmap with detailed tasks and acceptance criteria; update database documentation and query management

docs/database/query-order.md

@@ -0,0 +1,16 @@
+# Database Query Order
+
+This file is the canonical order of SQL files for database setup and migration.
+
+| Order | SQL file | Documentation | Status |
+| --- | --- | --- | --- |
+| 0001 | `supabase/schema.sql` | `docs/database/0001-initial-schema.md` | Baseline registered |
+
+## How To Add The Next Query
+
+1. Create a new SQL file under `supabase/migrations/`.
+2. Use the next order number.
+3. Add a documentation file under `docs/database/`.
+4. Register both files in this table.
+5. After running the SQL, add an entry to `query-log.md`.
+