fixes gsheet feeder<->db connection via context.

src/auto_archiver/core/storage.py

@@ -1,6 +1,6 @@
 from __future__ import annotations
 from abc import abstractmethod
-from typing import IO, Optional
+from typing import IO
 import os
 
 from loguru import logger

src/auto_archiver/modules/gsheet_feeder/gsheet_feeder.py

@@ -68,7 +68,7 @@ class GsheetsFeeder(Feeder):
                     folder = os.path.join(folder, slugify(self.sheet), slugify(wks.title))
 
                 m.set_context('folder', folder)
-                m.set_context('worksheet', {"row": row, "worksheet": gw})
+                m.set_context('gsheet', {"row": row, "worksheet": gw})
                 yield m
 
             logger.success(f'Finished worksheet {wks.title}')