fix(integration): asyncio auto-mode, per-test truncation, artist images IN-subquery

backend/app/services/artist_service.py

@@ -157,12 +157,16 @@ class ArtistService:
         if artist is None:
             return None
 
-        stmt = (
-            select(ImageRecord)
-            .join(ImageProvenance, ImageProvenance.image_record_id == ImageRecord.id)
-            .join(Source, Source.id == ImageProvenance.source_id)
-            .where(Source.artist_id == artist.id)
-            .distinct()
+        # Dedupe via IN-subquery rather than JOIN + DISTINCT: an image can
+        # have several provenance rows for one artist, and SELECT DISTINCT
+        # over ImageRecord fails in Postgres because its json columns have
+        # no equality operator.
+        stmt = select(ImageRecord).where(
+            ImageRecord.id.in_(
+                select(ImageProvenance.image_record_id)
+                .join(Source, Source.id == ImageProvenance.source_id)
+                .where(Source.artist_id == artist.id)
+            )
         )
         if cursor:
             cur_ts, cur_id = decode_cursor(cursor)