- Add modernc.org/sqlite (pure Go, no CGO)
- Create models package with Post struct
- Implement SQLite connection and schema auto-creation
- Add CRUD methods to database package
- Create post handlers with JSON API
- Register API routes: GET/POST/PUT/DELETE /api/v1/posts
- Set default DBURL to file:./data.db with WAL mode
- Rewrite logger package to use slog with LevelVar for dynamic levels
- Update all packages to use *slog.Logger instead of *zerolog.Logger
- Use TextHandler for TTY (dev), JSONHandler for production
- Add make check target (runs lint + test)
- Add make test target