Function program_from_blobs_by_hash 

pub fn program_from_blobs_by_hash(
    blobs: Vec<(FunctionHash, FunctionBlob)>,
    entry_hash: FunctionHash,
    source: &BytecodeProgram,
) -> Option<Program>

Build a minimal Program from function blobs and an explicit entry hash.

Used on the callee side to reconstruct a Program from blobs received in a RemoteCallRequest.