Today key points
1. Finished with the tests for part A - subscription_ids
2. Made the refinements in the code for subscription_ids to work (i.e. indexing middleware, meta)
3. Wrote the implementation
4. Refactoring of methods and tests
Tomorrow TODOs
1. Finish with refactoring.
2. Review the code, post a codereview
3. Move on to part B - subscription_patterns