fix(artifacts): name the ASAR header admission budget (#6172)

Keep the 16 MiB ASAR header/index ceiling fixed and report that budget,
the lack of a runtime override, and that source selection does not bypass
header admission.

Refs #5910

Co-authored-by: Cursor Agent <cursoragent@cursor.com>
Co-authored-by: morluto <morluto@users.noreply.github.com>

src/application/javascript/JavaScriptApplicationService.ts

@@ -188,6 +188,7 @@ const artifactFailureToOperationError = (
       ...(cause.partialObservation === undefined
         ? {}
         : { partialObservation: cause.partialObservation }),
+      ...(cause.admission === undefined ? {} : { admission: cause.admission }),
     },
   );