move const to top

src/feed.py

@@ -18,6 +18,8 @@ from textwrap import shorten
 from mutators import registry as mutator_registry
 from api import API
 
+DATETIME_FORMAT = "%Y-%m-%dT%H:%M:%S.%fZ"
+
 log = logging.getLogger(__name__)
 dumps = lambda _dict: json.dumps(_dict, indent=8)
 
@@ -248,9 +250,6 @@ class RSSFeed:
         return feed
 
 
-DATETIME_FORMAT = "%Y-%m-%dT%H:%M:%S.%fZ"
-
-
 @dataclass
 class DjangoDataModel(ABC):