Python: purview package unit test coverage tracking

[TaoChenOSU]

Description

Track and ensure the purview GA package achieves 85% unit test coverage as part of the overall requirement. Report current status, gaps, and actions needed to meet the threshold.

Package Versions

agent-framework-purview

[markwallace-microsoft]

@giles17 can you work with the Purview team to get the unit test coverage increased to 85%