Lodestar v1.7.0-alpha.11 Enforces EIP-8045 Slasher Exclusion

Lodestar v1.7.0-alpha.11 implements EIP-8045, excluding slashed validators from proposing. Adds fast confirmation rules, SSE events, and gossip bid selection. Forces proposer reorgs of late or unavailable blocks. Upgrades gossipsub to v16.0.2. Fixes 30+ bugs across payload validation, PTC votes, and proposer duties.