Compact vote state updates to lower block size

Active on mainnet-beta (epoch 491), testnet (epoch 516) and devnet (epoch 437).

Introduced in solana-labs/solana PR #26616.

Feature id 86HpNqzutEZwLcPxS6EHDcMNYWk6ikhteg9un7Y2PBKE.

Vortex

• Consensus leaderboard
• Fees leaderboard
• Validators
• Stake pools
• Decentralization
• Client versions
• Cluster status
• Governance
• Feature gates
• SIMDs
• Activity
• API and AI usage