Retrieve transcriptions from local cache in list_transcriptions

Depends on !69 (merged)

Closes #44 (closed)

arkindex_worker/cache.py

 # -*- coding: utf-8 -*-
 import json
+import logging
 
 from peewee import (
     BooleanField,
@@ -13,6 +14,8 @@ from peewee import (
     UUIDField,
 )
 
+logger = logging.getLogger(__name__)
+
 db = SqliteDatabase(None)
 
 
@@ -65,6 +68,7 @@ def init_cache_db(path):
         },
     )
     db.connect()
+    logger.info(f"Connected to cache on {path}")
 
 
 def create_tables():