Changelog

• Node version update to v26.2.1 (from v26.1.0) in #2
• Add Grafana and Prometheus for metrics/logging and dashboard in #2
• Improve documentation inline with above and improve testnet and mainnet changes in #2

Full Changelog: https://github.com/TreasureProject/treasure-node/commits/node-2.0-v26.2.1