Embedly consumer: switch to get_appsettings()

Using bootstrap() seems to cause issues with re-declaring the Prometheus
metrics (which happens in the tweens that we don't really need or want
anyway). There might be better ways to do this including not attaching
the tweens for scripts, but this seems to work fine (and was already
being done this way in the YouTube API consumer).

tildes/consumers/topic_embedly_extractor.py

@@ -8,7 +8,7 @@ import os
 from typing import Sequence
 
 from amqpy import Message
-from pyramid.paster import bootstrap
+from pyramid.paster import get_appsettings
 from requests.exceptions import HTTPError, Timeout
 from sqlalchemy import cast, desc, func
 from sqlalchemy.dialects.postgresql import JSONB
@@ -85,8 +85,8 @@ class TopicEmbedlyExtractor(PgsqlQueueConsumer):
 
 if __name__ == "__main__":
     # pylint: disable=invalid-name
-    env = bootstrap(os.environ["INI_FILE"])
-    embedly_api_key = env["registry"].settings.get("api_keys.embedly")
+    settings = get_appsettings(os.environ["INI_FILE"])
+    embedly_api_key = settings.get("api_keys.embedly")
     if not embedly_api_key:
         raise RuntimeError("No embedly API key available in INI file")