Ignore 404 errors for raw data

src/get_raw.py

@@ -111,8 +111,10 @@ class FileDownloader:
                 return error
 
             except aiohttp.ClientResponseError as e:
+                # we skip 404 errors since some files are simply missing
                 if e.status == 404:
                     logger.warning(f"File not found: {remote_filename}")
+                    return None
                 else:
                     logger.error(
                         f"HTTP {e.status} downloading {remote_filename}: {e.message}"