Your question is Data Integrity During System Migration. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
You're planning a migration from one data system to another and need a clean way to move pipeline logic, historical data, and downstream dependencies without corrupting records or creating reporting gaps. You want a migration approach that keeps data trustworthy while both systems may run in parallel for a period.
How do you ensure data integrity when migrating between systems?