This commit introduces a system to revoke tokens by storing their `jti` in a new `RevokedToken` model. It includes APIs for logging out (revoking a current token) and logging out from all devices (revoking all tokens). Additionally, token validation now checks revocation status during the decode process.
Clarify and fix relationship definitions by specifying foreign keys explicitly in User model. Add new relationships for gift categories and email templates to the Event model, and comment out unused EventUpdate relationship. These changes ensure better structure and future maintainability.
Created reusable `Base`, `UUIDMixin`, and `TimestampMixin` in `base.py`. Added a `User` model with attributes, relationships, and database configurations in `user.py` to establish a foundation for user-related features.