feat: slash for invalid checkpoint proposals

Author: alexghr

yarn-project/validator-client/src/validator.ts

@@ -84,8 +84,6 @@ const SLASHABLE_CHECKPOINT_PROPOSAL_VALIDATION_RESULT: Record<CheckpointProposal
   // enabled
   ['invalid_fee_asset_price_modifier']: true,
   ['checkpoint_header_mismatch']: true,
-  // These late mismatches should normally be caught by earlier checks, but if reached after validating the local
-  // checkpoint inputs, the proposer-signed payload disagrees with deterministic recomputation.
   ['archive_mismatch']: true,
   ['out_hash_mismatch']: true,
   ['no_blocks_for_slot']: true,