Upgrade API python version to 3.13

[chouinar]

Summary

Python 3.13 released on October 7th.

We should look to upgrade our API to use this new version.

There shouldn't be any major hurdles in upgrading our python version, many of the significant feature changes are either optional or affect very specific components of the language we aren't using. I would expect this upgrade to be very uneventful unless any of our dependencies have issues.

Changelog Overview

I would recommend we wait at least a few weeks to do this as we want our dependencies to be able to sort through any of their issues first.

Acceptance criteria

• [ ] Python upgraded - can follow guide in https://github.com/HHS/simpler-grants-gov/blob/main/documentation/api/package-dependency-management.md#upgrading-python for details on what this requires

[chouinar]

Also need to update: https://github.com/HHS/simpler-grants-gov/blob/main/.dockleconfig to have the 3.13 paths