00dcd54597
- Introduce `detach_reparent` parameter to command execution to support process reparenting. - Add `detach_session_reparent` to Unix command extensions using a double-fork technique to orphan processes from the shell descendant tree. - Update background pipeline logic to automatically apply reparenting when unwrapping transparent wrappers like `nohup`. - Remove unused `command_is_resolvable` helper.