Hexcast Ships EIP-8045 Spec in v1.44.0-rc.0

Hexcast released v1.7.0-alpha.8 spec, adding EIP-8045 to exclude slashed validators, fast confirmation rule, and forced reorgs of late payloads. Bug fixes target PTC votes, data availability, and payload validation. Gossipsub updated to v16.0.2; forkchoice debug endpoint v2 added.