feat: handle missing optional patch tags for pr/ flow

- Add mbox_parser module to extract metadata from patch content
- Extract author/committer from From: and Date: headers when tags missing
- Extract commit message body as fallback for description tag
- Implement best-guess parent commit logic using committer timestamps
- Update patch_supports_commit_ids to accept mbox-parseable patches
- Enable patches without optional tags to appear as pr/ branches

1 files changed, 1 insertions, 0 deletions

diff --git a/src/lib/mod.rs b/src/lib/mod.rs
index a09f866..b388b23 100644
--- a/src/lib/mod.rs
+++ b/src/lib/mod.rs
@@ -5,6 +5,7 @@ pub mod git;
 pub mod git_events;
 pub mod list;
 pub mod login;
+pub mod mbox_parser;
 pub mod push;
 pub mod repo_ref;
 pub mod repo_state;