v2.6.9-testnet

IMPORTANT: sn-manager setup and auto-update guide:
https://github.com/LumeraProtocol/supernode/blob/master/sn-manager/README.md

What's Changed

• exposed LEP-6 metrics for aggregation by @j-rafique in https://github.com/LumeraProtocol/supernode/pull/332

Full Changelog: v2.6.8-testnet...v2.6.9-testnet