Behavior: Records a user interaction (such as a view, click, or like) with a specific content item to improve personalized recommendations.

Authorization: Requires an authenticated user (method-level [Authorize]).

Side Effects: The user interaction is recorded in the recommendation engine, which may influence future recommendations for this user.

Error Scenarios: Returns 401 if the user is not authenticated. Returns 400 if the action or ID parameters are invalid. Returns 500 if the interaction submission fails.