Finding and your answer
Calendar.DateKey column (Int64)
Direct match
99%
How the model read it
Current gold observes the qualified column `Calendar.DateKey` as Int64, matching the requested column kind and data type.
Workbook evidence
Cited current gold
Open questions
Confirm that current DateKey values follow the requested YYYYMMDD encoding; current gold establishes the object and type but not value-level conformance.