ENH: also considere Referenzes of children of given RTs

src/caoscrawler/identifiable_adapters.py

@@ -212,11 +212,17 @@ identifiabel, identifiable and identified record) for a Record.
                 # TODO: similar to the Identifiable class, Registred Identifiable should be a
                 # separate class too
                 if prop.name.lower() == "is_referenced_by":
-                    for rtname in prop.value:
-                        if (id(record) in referencing_entities
-                                and rtname in referencing_entities[id(record)]):
-                            identifiable_backrefs.extend(referencing_entities[id(record)][rtname])
-                        else:
+                    for givenrt in prop.value:
+                        rt_and_children = [p.name
+                                           for p in db.execute_query(f"FIND RECORDTYPE {givenrt}")]
+                        found = False
+                        for rtname in rt_and_children:
+                            if (id(record) in referencing_entities
+                                    and rtname in referencing_entities[id(record)]):
+                                identifiable_backrefs.extend(
+                                    referencing_entities[id(record)][rtname])
+                                found = True
+                        if not found:
                             # TODO: is this the appropriate error?
                             raise NotImplementedError(
                                 f"The following record is missing an identifying property:"