## Description 

we may want to provide static pub keys to accept when receiving metrics
from sui-node; this pr allows us to do that.
this is also useful if we need to allow any general node to send us data
and not be in the consensus committee.

there is a breaking change for sui-proxy, the config format have changed
to support the idea of dynamic and static keys, but this is minor and
will be adjusted along with the static key config.

## Test Plan 
local testing

---
If your changes are not user-facing and do not break anything, you can
skip the following section. Otherwise, please briefly describe what has
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### Type of Change (Check all that apply)

- [ ] protocol change
- [ ] user-visible impact
- [ ] breaking change for a client SDKs
- [ ] breaking change for FNs (FN binary must upgrade)
- [ ] breaking change for validators or node operators (must upgrade
binaries)
- [ ] breaking change for on-chain data layout
- [ ] necessitate either a data wipe or data migration

### Release notes