[2025] Let's figure out logging

[pcraig3]

Logging is a thing we should do.

Here is the basic idea: cds-snc/cra-claim-tax-benefits#254

1. All logs should go to stdout
2. All logs should be JSON

Right now they all go to stdout, but they aren't particularly readable or searchable. Let's clean 'em up!!!

[pcraig3]

Note that the SimplerGrants team is using this format, so we have as strong preference for something that looks like this: HHS/simpler-grants-gov#2884