Ensure all metadata operations consistently use the database layer,
removing filesystem-only fallback paths and conditional DB checks.
- Simplified migration scripts to always run on startup
- Updated document/audiobook APIs to always query DB
- Added ensureDbIndexed() calls across all routes
- Extracted test namespace utilities to dedicated module
- Removed migration-manager.ts (functionality consolidated)
- Updated rate limiter to assume DB is always available
BREAKING CHANGE: Database is now required in all configurations.
When auth is disabled, SQLite is used by default at /app/docstore/sqlite3.db.
Relocate migration scripts to `drizzle/scripts`, update `start` and
`migrate`
to use the new path, and add a `generate` script for contributors.
Update README migration guidance for SQLite vs Postgres workflows.
BREAKING CHANGE: remove `migrate:force` and change migration script
paths; consumers relying on `scripts/migrate*.mjs` or `pnpm
migrate:force` must update to the new commands.
