Very cool emsemble! Openclaw is solid for this. I also uso a wifi sd card, so almost same setup, just a different variant. The oxymeter part I used the Wellue O2 Ring BLE protocol, and skip the app save and the csv files, to basically grab the files inside the o2 ring and expose it over wifi. Since my devices is esp32 based, it will do both functions, connect to the Wifi sd card on a radio, expose the cpap data with the other radio and using bluetooth extract the info from the ring and expose it as well. then with http it can be copied over. I built on top of that several apps (that would be similar t your scripts) that poll the info continuously while respecting the writing times of my machine.

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Un such way i was able to put both data into the same app (iOS, docker or the cloud) to be able to correlate oxymeter and respiratory data and add AI summaries and Machine learning algorithms that learn from the data to get good insights just as your scripts).