fix: remove outdated patch_supports gate and fix fetch parent fallback

Remove the patch_supports_commit_ids gates in checkout.rs and list.rs
that pre-dated the mbox fallback logic. apply_patch_chain already
handles all fallback cases. Also replace the main-branch TODO fallback
in make_commits_for_proposal with get_parent_commit_from_patch, which
uses timestamp-based best-guess when the parent-commit tag is absent.

0 files changed, 0 insertions, 0 deletions