Add additional samples for importing Samples JSON data into SQL

Add additional documentation for importing the sample-data.zip into SQL.  This would be helpful for people wanting to test a complex import.

[migration-sql2.json](https://github.com/user-attachments/files/22323437/migration-sql2.json)

[dbo.DmtSnapshot.sql](https://github.com/user-attachments/files/22323439/dbo.DmtSnapshot.sql)