0977d3a58b
- Add SQLite and UUID dependencies (go-sqlite3, google/uuid) - Create database connection with automatic migrations - Implement UserRepository with full CRUD operations - Implement HabitRepository with JSON serialization for arrays - Implement HabitEntryRepository with date range queries - Add comprehensive test coverage for all repositories - Fix User entity to default timezone to UTC when empty - All tests passing with TDD approach (Red-Green-Refactor)