SendNetworkRequest

Sends an HTTP request to url with method, headers, body and an optional timeoutMillis, and emits the response downstream — the general-purpose way to talk to a backend from inside an event chain. A JSON response is parsed into plain maps, lists and primitives (a JSON body that fails to parse yields null); anything else is passed through as a raw ByteArray. Does not consume incomingData. Dispatches onStart before the request is sent; onNetworkResponse(status)/onNetworkFailure(status) (carrying the parsed body) when a child event is wired to that exact HTTP status — the former for 2xx, the latter for the rest; onSuccess (carrying the parsed body) when the response is 2xx and no status-specific event was declared; onFailure (carrying the parsed body, or the Throwable on transport failures like timeout/no connectivity — logged) when the response isn't 2xx and no status-specific event was declared. Exactly one outcome trigger fires per response.

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