- start_all, stop_all: emit 'starting/stopping N nodes...' and complete
lines with project name+id, matching the open-node/link log style.
- close: emit 'project closing.../closed' bracketing the whole teardown.
- Revert start_all concurrency 20->3 and reset_console 20->3: start
(ubridge process + docker start + network) is heavy enough that high
concurrency risks overwhelming the server. stop remains 100 (kill is
light) and suspend remains 50 (pause is light).
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