detchar.create_cache's gwdatafind frame type needs to be reconsidered

Current implelemntation uses gwdatafind.find_urls to look for data that's expired from /dev/shm/kafka.

If I feed it H1_llhoft as the frame type, I can only look for data that's ~46 days old. If I feed it H1_HOFT_C00, I can find much older data, but can't find newer data since segments haven't been built yet.

There either needs to be a different frame type requested which will cover all periods of data, or additional logic must be implemented to ensure that all time is covered.