Attempt pandas na fix

[wagnerlmichael]

Potential solution:

When a date is missing, pandas represents it as NaT ("Not a Time"). The if value is supposed to catch
missing values and skip formatting, but NaT is truthy in Python. So the code calls .strftime() on NaT and errors out.

This bring in a bigger question about why are are missing ["final_model_run_date"] in the first place, which needs further investigation. Perhaps it is a natural part of the workflow for ineligible PINs?

[jeancochrane]

I'm definitely interested in getting to the bottom of this, but in the meantime, I noticed that this behavior changed due to the fact that our uv installation step is ignoring the lockfile and installing a new major version of pandas. This PR should fix the issue faster: #158

[jeancochrane]

@wagnerlmichael Do you think we'll pick this work back up, or should we close this due to #158 resolving the immediate problem?