Let's remove some sleep loops, and instead: 1. Use Type=notify to wait until "resolvectl monitor" successfully installed its monitor, so that we know that queries enqueued later will definitely be seen. 2. Use "grep -m1" to watch "journalctl -f" output to wait precisely for the RR data we want to see, and immediately exit. This shortens code quite a bit, and should make it more robust.
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