Function validate_standalone_warmstart_provenance 

pub fn validate_standalone_warmstart_provenance(
    contract: &WarmStartExactJhTeacherContract,
    observation_bits: usize,
    observation_stream_len: usize,
    reward_bits: usize,
) -> Result<(), WarmStartExactJhError>

Validates standalone planner-run provenance hashes against canonical standalone declarations.

Used by the corresponding method on the private WarmStartExactJhRuntimeConfig and by validate_warmstart_teacher_against_compiled_planner_run.