The redis caching code in `CompareSecurityReportsService` causes a lot of bugs so we should evaluate whether it can be safely removed. #### Background In !224794#note_3151805582, @bwill noted: > I think that the frontend actually isn't polling this endpoint anymore to determine if there is security widget data. Since !201475 was merged, we now make a graphql request instead which runs a cheap DB query to check if results are ready. Therefore, I think we can actually delete all this redis code and save ourselves the headache. #### Tasks 1. Verify that the frontend no longer uses the REST endpoint that relies on Redis caching 2. Confirm that the GraphQL approach introduced in !201475 fully replaces the Redis-based polling 3. Identify all Redis caching code related to security widget state (including `ready_cache_key` and transition keys) 4. If safe to remove, create an MR to clean up the Redis caching code 5. Update any relevant documentation #### Related Issues - #592403 - Tracking improvements for security widget state management