[FEATURE] Add redis/celery task to regularly clear expired revoked tokens

## Feature Description

Each day, Redis & Celery should automatically remove any expired tokens from the `revoked_jwts` table in the database.

## Why It's Worth Implementing

Without an automated system, we will quickly generate a rather large `revoked_jwts` table in the database. Since the tokens will already be specified to expire after 10 days (specified in #154), we can remove tokens older than that from the `revoked_jwts` table in the database automatically.

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## Acceptance Criteria & Solution Requirements
*To close this issue, the following must be met (can be finalized in the comments):*
- [ ] 1. Application runs as expected with the new feature integrated seamlessly.
- [ ] 2. Code quality metrics are maintained, and linting has been considered in development.
- [ ] 3. Testing metrics are maintained, and tests have been updated/added wherever relevant during development.
- [ ] 4. Documentation has been updated to reflect the changes made during development.
- [ ] 5. Add Redis and Celery to the docker-compose.yml stack for the application.
- [ ] 6. Implement Redis and Celery within flask to automatically delete expired entries in `revoked_jwts` from the revoked tokens list once per day.

Look at the docker-compose.yml to see the current stack, then find where revoked_jwts are stored (likely a model or table). Research Celery periodic tasks in Flask (e.g., celery beat) to schedule a daily job. The task should query for tokens older than 10 days and delete them. Check for existing tests around token revocation to understand the data model and add tests for the new cleanup task.

Scritto dal modello di indicizzazione a partire dal testo della issue.