Edgy unions | pod: create_item_tx: handle new schema structure
{"ops":[{"insert":"Issue: If the same target type is added twice, it will create two separate items in the database. Instead, create_item_tx should check for existing EdgeSchemaTypes, and update the existing item."},{"insert":"\n","attributes":{"block-id":"block-6dc7885b-23cb-4116-bc5a-678d599bbe0a"}},{"insert":"\n","attributes":{"block-id":"block-880e7f5e-a027-42c9-a08a-56f98a89375f"}},{"insert":"