Ahmed Ibrahim
b39ae9501f
## Summary - stop reserving a localhost port in the websocket tests before spawning the server - let the app-server bind `127.0.0.1:0` itself and read back the actual bound websocket address from stderr - update the websocket test helpers and callers to use the discovered address ## Why this fixes the flake The previous harness reserved a port in the test process, dropped it, and then asked the server process to bind that same address. On busy runners there is a race between releasing the reservation and the child process rebinding it, which can produce sporadic startup failures. Binding to port `0` inside the server removes that race entirely, and waiting for the server to report the real bound address makes the tests connect only after the listener is actually ready.
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