Merge branch 'pw/rebase-drop-notes-with-commit'

The rebase post-rewrite notes-copying logic has been corrected. When a commit is dropped during rebase (e.g., because its changes are already upstream), it is no longer recorded as rewritten, preventing its notes from being copied to an unrelated commit. * pw/rebase-drop-notes-with-commit: sequencer: do not record dropped commits as rewritten sequencer: use an enum to represent result of picking a commit sequencer: simplify pick_one_commit() sequencer: remove unnecessary condition in pick_one_commit() sequencer: simplify handling of fixup with conflicts sequencer: remove unnecessary "or" in pick_one_commit() sequencer: never reschedule on failed commit sequencer: be more careful with external merge t3400: restore coverage for note copying with apply backend