The initial investigation and the PoC implementation for the DisAgg MVP verification should be developed as a part of WT-14907. The next part of the productization process is testing. This ticket is aimed to develop a reasonable amount of unit testing coverage for the DisAgg verification functionality. 

Currently, since the initial implementation contains only stable table verification logic, I can split testing directions to the following ones:

• Leader verification
• Follower verification
• HS verification
• Oplog imitation (not very important since we don't check the ingest table, but still reasonable as a test case)

The full test plan could be found here: https://docs.google.com/document/d/1oLiabKePG74p8PWBriMJWH-_v1RSxdGsCExKEK60EYw/edit?tab=t.o83t86l6yeky

Some of the test cases could be potentially moved to another ticket since we currently have limited resource for this activity.