fix(test): ruff F841 — don't bind unmatched seed images (tuple-unpack flagged)

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/test_gallery_provenance_filter.py

@@ -55,7 +55,9 @@ async def _post(db, artist_name, slug, ext):
 
 @pytest.mark.asyncio
 async def test_scroll_post_id_filter(db):
-    i1, i2, i3 = await _img(db, 1), await _img(db, 2), await _img(db, 3)
+    i1 = await _img(db, 1)
+    i2 = await _img(db, 2)
+    await _img(db, 3)  # unmatched image — proves the filter excludes it
     _, s, p = await _post(db, "A", "a", "10")
     db.add(ImageProvenance(image_record_id=i1.id, post_id=p.id,
                            source_id=s.id))
@@ -85,7 +87,8 @@ async def test_scroll_post_id_dedups_multi_rows(db):
 
 @pytest.mark.asyncio
 async def test_scroll_artist_id_filter(db):
-    i1, i2 = await _img(db, 1), await _img(db, 2)
+    i1 = await _img(db, 1)
+    await _img(db, 2)  # unmatched image — proves the filter excludes it
     a, s, p = await _post(db, "A", "a", "10")
     db.add(ImageProvenance(image_record_id=i1.id, post_id=p.id,
                            source_id=s.id))