feat(validator): missing transaction metadata handling

[t00ts]

In the validator execution, we're ignoring certain metadata:

• class info
• paid fee on L1
• deployed contract address

This is fine now because:

• We're only using L1Handler transactions (simple, no class info needed)
• Current tests focus on batch execution logic, not perfect transaction validation
• We're not testing Declare or DeployAccount transactions

But for production use, these would cause failures.

See also #3041