Expand description
CDP client over chromiumoxide (single connection — no dual WebSocket).
Chrome one-shot: Browser::launch only.
Lightpanda / attach path: Browser::connect only.
FORBIDDEN: second tokio-tungstenite attach to the same browser.
§Workload
I/O-bound CDP WebSocket. Multi-page listener attach fans out with
crate::concurrency::join_bounded after releasing browser.lock
(rules: never hold a lock across unbounded sequential awaits when pages
are independent).