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 Driver framework
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``driver.Driver`` supplies ``Run`` and a nonblocking ``Refresh``
request. The runner starts an explicit list, forwards broker reconnect
notifications, and waits for cleanup. A driver returns errors without
logging. The runner logs failures and cancels peers. Cancellation and
closed transports are expected stops only after the worker context
stops. A joined independent failure remains a failure.

``cmd/onehouse`` supplies an empty driver list. It waits for SIGINT or
SIGTERM and finishes cleanup before exit. No integration or broker runs.

Tests use fake drivers. They do not verify a broker or a physical
device.