patch_prox should check against actual Koha record

[phette23]

It seems like many students, while their prox numbers haven't changed across multiple prox reports, still don't have them in Koha. But the way the patch_prox_num script works is, to minimize HTTP requests, we just check against the most recent prox report and the last one we have on disk and only consider it a "changed" number if there's a difference there. There seem to be many situations where a student record is created or otherwise update such that their prox falls out of date but the script doesn't catch the change.

Paul sent me a couple example students to work with today. One still has their old cardnumber (not prox) so that should be a good test. We need the script to actually pull the Koha record, check for a prox num difference, and make an update if so. We can get rid of the code that compares a past prox report to the current one.