refactor(imports): update field name

Propagate Expression model field
rename from publication_date to
publication_date_manual_input to
import scripts.

apis_ontology/scripts/import_helpers.py

@@ -173,7 +173,7 @@ def create_expression(
         defaults={"data_source": source},
     )
     if pub_date:
-        expression.publication_date = pub_date
+        expression.publication_date_manual_input = pub_date
         expression.save()
 
     return expression, created