ccb-diagnose

# CCB Diagnose Diagnose exactly one current mounted agent. Start with CCB authority: ```bash command ccb ping "$AGENT" command ccb ps command ccb queue --detail "$AGENT" command ccb pend --inbox --detail "$AGENT" ``` Use `ccb trace` for a current lineage id and `ccb doctor logs` for provider/API evidence. For DSH, the pane is only the managed host process/log surface: pane text is not prompt, reply, or completion authority. Native authority is the exact DSH session/RPC event history and `turn/end` reason recorded by CCB. Do not read credentials, mutate tmux directly, restart all agents, or submit a GitHub issue without showing a redacted proposal and receiving explicit authorization. Apply only a bounded supported repair, then re-check the same runtime and lineage evidence.