Anything occupying <repo>/worktrees/<branch> — one of ours, one the
operator made, an unrelated directory — is now bypassed by appending
-2, -3, ... to the directory; the branch stays as requested. The same
suffix applies under the [daemon].worktree_root override.
The daemon no longer asks whether an occupant is "ours": delete
registered_for(), the adoption branch in run_add and the
SessionManager::create live-session check, plus WorktreeError::PathExists.
A branch already checked out elsewhere is git's refusal to surface,
already marked by the branch picker's is_head/worktree flags.
Miguel Palhas
0457a61a61