Romanchuk/Change type for edrpou property (#766)

* Change the type of property

* Delete migration

* Add migration

Author: alrom

OutOfSchool/OutOfSchool.DataAccess/Models/Provider.cs

@@ -49,7 +49,7 @@ public class Provider : IKeyedEntity<Guid>, IImageDependentEntity<Provider>
         @"^(\d{8}|\d{10})$",
         ErrorMessage = "EDRPOU/IPN code must contain 8 or 10 digits")]
     [MaxLength(12)]
-    public long EdrpouIpn { get; set; }
+    public string EdrpouIpn { get; set; }
 
     [MaxLength(50)]
     public string Director { get; set; } = string.Empty;