- Refactored server API to use SQLite database instead of nfdump
- Added better-sqlite3 dependency for database access
- Enhanced database schema with comprehensive netflow_stats table
- Implemented groupBy support for month/date/hour aggregation
- Updated documentation with correct table schema information
- Relocated database file to project root for better access

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>