lighthouse/validator_client
Mac L fd55373b88 Add new VC metrics for beacon node availability (#3193)
## Issue Addressed

#3154 

## Proposed Changes

Add three new metrics for the VC:
1. `vc_beacon_nodes_synced_count`
2. `vc_beacon_nodes_available_count`
3. `vc_beacon_nodes_total_count`

Their values mirror the values present in the following log line:
```
Apr 08 17:25:17.000 INFO Connected to beacon node(s) synced: 4, available: 4, total: 4, service: notifier
```
2022-05-26 02:05:16 +00:00
..
slashing_protection Replace OpenOptions::new with File::options to be readable (#3059) 2022-03-07 06:30:18 +00:00
src Add new VC metrics for beacon node availability (#3193) 2022-05-26 02:05:16 +00:00
Cargo.toml Update and consolidate dependencies (#3136) 2022-04-04 00:26:16 +00:00