Update composite primary key for subscriptions to prevent BSN clashes

sharedmodel/subscription.go

@@ -27,7 +27,7 @@ type Subscription struct {
 	SubjectAddressCity         string
 	SubjectAddressCountry      string
 	ProtocolMeta               string
-	ServiceConfigID            uint
+	ServiceConfigID            uint `gorm:"primarykey"`
 	ServiceConfig              *ServiceConfig
 }