Function apply_plan 

pub fn apply_plan(
    patcher: &mut dyn BytePatcher,
    plan: &PatchPlan,
    config: &ApplyConfig,
) -> Result<PatchManifest>

Apply every operation in plan through patcher, returning the durable manifest that records what changed.

On a partial failure (any read or write returning Err) the function aborts immediately and propagates the error; the manifest for the partial run is not returned, so the caller must use the backup at config.backup_path to recover.

Errors

Propagates I/O failures from hashing the binary, plus any error produced by the underlying BytePatcher.