Handle missing action flag due to malformed input file. (#600)

Author: mfjarvis

recordprocessor/src/process_row.py

@@ -12,7 +12,7 @@ def process_row(target_disease: list, allowed_operations: set, row: dict) -> dic
     (where applicable), version(where applicable) and any diagnostics.
     The local_id is combination of unique_id and unique_id_uri combined by "^"
     """
-    action_flag = row.get("ACTION_FLAG", "").upper()
+    action_flag = (row.get("ACTION_FLAG") or "").upper()
     unique_id_uri = row.get("UNIQUE_ID_URI")
     unique_id = row.get("UNIQUE_ID")
     local_id = f"{unique_id}^{unique_id_uri}"