Squad-leader follow-ups on the same issue now reuse the prior daemon-managed workdir and provider session instead of starting fresh, while never binding or locking a user-provided local_directory. Reuse eligibility is keyed off a Prepare-time .managed_env.json provenance marker, so it does not race the completion→GC-metadata write.
Closes#5535
Co-authored-by: Bohan <bohan@devv.ai>
