Rebuild data storage system so that database dependencies get taken into account

test/RestApiTest/Models/Employee.cs

@@ -0,0 +1,8 @@
+namespace RestApiTest.Models;
+
+public class Employee {
+    public int EmployeeId { get; set; }
+    public string Name { get; set; }
+
+    public virtual Address Address { get; set; }
+}