- Replaced `data_storage.py` with `database.py` to use SQLite instead of a JSON file for data storage.
- Added an `enforce_retention_policy` function to `database.py` to delete data older than 7 days.
- Called this function in the main monitoring loop in `monitor_agent.py`.
- Added Docker container monitoring.
- Updated `.gitignore` to ignore `monitoring.db`.
- Add -R flag to Nmap scan options to enable reverse DNS lookup.
- Modify the Nmap processing logic to extract and store hostnames.
- Update PROGRESS.md to reflect the completion of the task.
