Download gravatar images to blob storage to prevent browser warnings

tjementum commented 2 weeks ago

Summary & Motivation

Add logic to download Gravatar images to blob storage, addressing browser console warnings about "Tracking Prevention blocked" when loading assets from external sites. The Gravatar image is downloaded when a user is created and refreshed each time the user logs in.

To support this functionality, the logic for saving an avatar to blob storage has been refactored into a new, shared AvatarUpdater class. Additionally, a new GravatarClient has been created in a new Infrastructure namespace. This update demonstrates a method for extracting shared logic within a vertical-sliced architecture while adhering to the single responsibility principle.