* feat: add idv events to api
- moved what was in signals.py to a handlers.py (which is what their file should have been called)
* chore: quality
* fix: rename test file + imports
* fix: change handler reverse url in other tests
* fix: refactor signals and handlers pattern
- following OEP-49 pattern for signals directory
- user removed as param for update function
- event now emitted after save
* fix: unpin edx-name-affirmation
* chore: add init to signals dir
* fix: compile requirements
* chore: quality
* chore: fix some imports
* chore: quality
* test: added signal emissions to test_api
* chore: lint
