i just hope the temps stay managable for me, since i spent a few k redoing this system multiple times, mostly on pumps failing (sigh)... my current pump that has lasted the longest is a simple submerged utility pump rated for 100% duty cycle at 80% load i picked up off local hardware store...
i have geothermal heating/cooling in my house. uses 2000 feet (4x500 foot loops) of pex buried 5 feet down in the back yard and its connected to a 3.5 ton heat pump. system is around 6 years old
the ground loop is driven by two of these pumps in series:
https://www.pexuniverse.com/grundfos-up26-99f-circulator-pump-52722355but mine say 230v not 120v. but thats the model UR 26 99F
they dont run 24/7 year round but in super cold weather (say like -15F at night to 15F in the day) the system runs 24/7 for days, switching between high and low power modes.
maybe look into something like that? they look like they are continuous duty but maybe write them and see if its 24/7/365 rated?