recover-stalled-subagent

Recover a stalled initiative-executor subagent's uncommitted worktree into a WIP branch + remove the worktree cleanly in one invocation. Use when: an orchestrator spawn returned a malformed result (no <<<RESULT>>> sentinel) or emitted an internal-thought fragment as its final message, and the subagent's .worktrees/<id> still contains uncommitted work that must not be lost. Takes the remediation branch name as input.…