* fix(artifacts): accept the bundle subject when extracting an app bundle
For a .app target the session target is the bundle's executable, while the
artifact provider reports the bundle itself as the subject. The subject
check exempted inventory_artifact and inspect_artifact but not
extract_artifact, so extracting any .app failed with execution_failure after
the output tree had already been written, and the output path was never
reported.
* refactor(binary): rename artifact bundle subject helper
isArtifactInventorySubject also covers extract_artifact for .app
bundles, so name it for the shared bundle-subject exemption.
---------
Co-authored-by: Cursor Agent <cursoragent@cursor.com>