Changed 'tx' and 'rx' data sources to DERIVE to improve accuracy and minimize false spikes in rate calculations. This ensures better handling of resets or rollovers in the monitored data.
Introduces a new RRDTool service for tracking WireGuard interface and peer statistics. Adds required Docker configuration, API key handling, and new scripts for managing RRD files. Updates the `entrypoint.sh` and API permissions to accommodate the new functionality.
