Cancel a Bridge Job

Require one job identifier. Run python "${CLAUDE_PLUGIN_ROOT}/bin/bridge_call.py" cancel --job-id "<job-id>"; always pass the same --workspace value the originating detached call used, since a different or omitted value resolves to another default workspace. Report returned cancellation-request state; do not claim termination complete. On cancel_requested, direct caller to poll /bridge:status or /bridge:result for final state. A missing result proves nothing about the job: mismatched workspace, a job that never existed, or one that finished and was pruned — report the possibilities rather than a termination claim; the job store cannot distinguish the last two. Preserve returned incident, transcript, or workspace-delta paths.