ensure worker failures do not count fatal errors during the request #1336
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If a fatal error occurs during script execution (#1332), then the worker will count that towards stopping the entire process to prevent run-away executions.
This PR adds a simple flag that can be used to determine if we crashed inside a request, or inside the worker script itself. If the crash happens during a request, we do not count that and restart the worker asap. For crashes that happen in worker scripts, it still behaves as before.