I managed to build it myself for 1MB. Config is saved. Alarm events are reported but zone names are missing and it will arm but not disarm at the moment. But I suspect this is a problem with the alarm panel not the esp code. I'll post an update when I've figured it all out.

Edit: Quick update. I ...

@ayasystems
Excellent timing!
I've been trying to piece together something like this for the last couple of days, and just found your project this morning.

I flashed the v2 4MB release you provided a couple of days ago (despite using an ESP-01S 1MB, not a 4MB device), and it fired up fine and ...