Cool solution!
A lot of the auditing of what you have built will actually be available as part of the Governance Hub. It is built on the system tables
- It also contains a lot of other cool features that are more in the areas of Data Quality, Classification etc.
It is currently in Private Preview, so you need to contact your Databricks Account Team to enroll - but sounds like you might benefit from seeing it - and could have some cool ideas for the team. Highly recommend it!