Function apply_contract 

pub fn apply_contract(
    records: Vec<Value>,
    contract: &CompiledContract,
) -> Result<ContractOutcome, FaucetError>

Available on crate feature contract only.

Apply the contract to one page. Pure: no metrics, no DLQ I/O.

Records are evaluated in order; per record, the first breach wins (fields in declared order, then the extra-field check). Policy:

• fail — return FaucetError::ContractViolation on the first breach.
• quarantine — move breaching records to quarantined.
• warn — record the breach in warned, keep the record in survivors.