Entity Framework is now working in a Fabric SQL Database for me. I have not created a new table yet, but I migrated an Azure SQL Server database over to Fabric and I am able to read from and update it as expected using the .database.fabric.microsoft.com endpoint. 

We should consider this ticket closed unless I run into a problem later when creating a new table/POCO. Even if I have a problem, I have a way by which I can continue to use Entity Framework with Fabric SQL Database.

Thanks Microsoft!!!!