Fix json loader - it should go in 'validators' not 'utils'

Fixes #214

src/auto_archiver/modules/gsheet_feeder/__manifest__.py

@@ -35,7 +35,7 @@
                 "replaywebpage": "replaywebpage",
             },
             "help": "names of columns in the google sheet (stringified JSON object)",
-            "type": "auto_archiver.utils.json_loader",
+            "type": "json_loader",
         },
         "allow_worksheets": {
             "default": set(),

src/auto_archiver/modules/gsheet_feeder/gsheet_feeder.py

@@ -24,9 +24,8 @@ class GsheetsFeeder(Feeder):
     def setup(self) -> None:
         self.gsheets_client = gspread.service_account(filename=self.service_account)
         # TODO mv to validators
-        assert self.sheet or self.sheet_id, (
-            "You need to define either a 'sheet' name or a 'sheet_id' in your manifest."
-        )
+        if not (self.sheet or self.sheet_id):
+            raise ValueError("You need to define either a 'sheet' name or a 'sheet_id' in your manifest.")
 
     def open_sheet(self):
         if self.sheet:

src/auto_archiver/modules/telethon_extractor/__manifest__.py

@@ -18,7 +18,7 @@
             "channel_invites": {
                 "default": {},
                 "help": "(JSON string) private channel invite links (format: t.me/joinchat/HASH OR t.me/+HASH) and (optional but important to avoid hanging for minutes on startup) channel id (format: CHANNEL_ID taken from a post url like https://t.me/c/CHANNEL_ID/1), the telegram account will join any new channels on setup",
-                "type": "auto_archiver.utils.json_loader",
+                "type": "json_loader",
             }
         },
     "description": """