SFMS: precip 24 hour raster diff issue

[conbrad]

Actual Behaviour We receive some errors when processing RDPS data, stemming from the numba calls

Encountered an error while processing RDPS data.
rdps-sfms-wps-prod-28787933-rplnb (1): Failed in nopython mode pipeline (step: nopython frontend)
non-precise type pyobject
During: typing of argument at /app/app/weather_models/precip_rdps_model.py (139)

File "app/weather_models/precip_rdps_model.py", line 139:

def _diff(value_a: float, value_b: float):
^

Steps To Reproduce

Unclear, however errors do show up seemingly daily in error logs, e.g. https://chat.developer.gov.bc.ca/group/predictiveservicesteam-prod?msg=ySq8YM7NMgQ52Jons

Screenshots

If applicable, add screenshots to help explain your problem.

Expected Behaviour

No errors should show up in logging, we should have correct precip 24 hour diff rasters produced daily.