chore: added checks for item identifiers

generators/generate_indicators.py

@@ -339,6 +339,11 @@ def handle_GeoDB_endpoint(config, endpoint, data, catalog):
             countries.append(country)
         if city not in cities:
             cities.append(city)
+        # sanitize city identifier to be sure it is filename save
+        city = "".join([c for c in city if c.isalpha() or c.isdigit() or c==' ']).rstrip()
+        # Additional check to see if city name is empty afterwards
+        if city == "":
+            city = "undefined"
         min_date = min(times)
         max_date = max(times)
         latlon = unique_values["aoi"]