Fix seeding bugs add missing tests

[whabanks]

Summary | Résumé

This PR fixes an issue with the annual limit client. Related alarm that caught this.

Related Issues | Cartes liées

• Annual Limit daily delivered & failed notification counts and seeding implementation #333
• Clear Redis notification counts during nightly fact job notification-api#2344

Test instructions | Instructions pour tester la modification

Tests pass, issue in staging is resolved.

Release Instructions | Instructions pour le déploiement

None.

Reviewer checklist | Liste de vérification du réviseur

• This PR does not break existing functionality.
• This PR does not violate GCNotify's privacy policies.
• This PR does not raise new security concerns. Refer to our GC Notify Risk Register document on our Google drive.
• This PR does not significantly alter performance.
• Additional required documentation resulting of these changes is covered (such as the README, setup instructions, a related ADR or the technical documentation).

⚠ If boxes cannot be checked off before merging the PR, they should be moved to the "Release Instructions" section with appropriate steps required to verify before release. For example, changes to celery code may require tests on staging to verify that performance has not been affected.