Lazy-import similar_talks to fix Gunicorn worker OOM on startup (#4569)

Author: patrick91

backend/reviews/admin.py

@@ -13,7 +13,6 @@
 
 from reviews.adapters import get_review_adapter
 from reviews.models import AvailableScoreOption, ReviewSession, UserReview
-from reviews.similar_talks import compute_similar_talks, compute_topic_clusters
 from submissions.models import Submission, SubmissionTag
 from users.admin_mixins import ConferencePermissionMixin
 
@@ -452,6 +451,8 @@ def review_recap_compute_analysis_view(self, request, review_session_id):
         accepted_submissions = self._get_accepted_submissions(conference)
         force_recompute = request.GET.get("recompute") == "1"
 
+        from reviews.similar_talks import compute_similar_talks, compute_topic_clusters
+
         similar_talks = compute_similar_talks(
             accepted_submissions,
             top_n=5,