stake-weight-subscription via yellowstone-geyser + mango-feeds

[grooviegermanikus]

Problem:

lite-rpc relies on heavy Full-RPC calls to retrieve leader schedule / vote accounts / slot leader.

Proposed solution:

Use yellowstone-geyser-plugin to exfiltrate stake weight using gRPC protocol. Depends on open feature request for yellowstone - (see yellowstone):

• getClusterNodes
• getVoteAccounts
• getSlotLeaders (reduandant)

Implement publish-on-connect.

Milestones:

1. Replace RPC calls with gRPC subscription to stake weight.