test(sandbox): pin runner argv forms

packages/bash/bash-sandbox/src/index.ts

@@ -124,6 +124,8 @@ export class SandboxBashExecutor extends LocalBashExecutor {
     try {
       proc = this.startArgv(spec, confined.argv)
     } catch (error) {
+      // LocalSubprocessService reports provenanced ENOENT/EACCES through async
+      // `done` rejection; this covers alternatives that throw that shape synchronously.
       if (isRunnerSpawnFailure(error, confined.argv[0], spec.workdir)) {
         throw new SandboxUnavailableError(mode, String(error))
       }