feat(provenance): importer sets image_record.artist_id, stops minting artist tags

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

tests/test_importer_artist_id.py

@@ -0,0 +1,54 @@
+"""FC-2d-vii-c: importer sets artist_id, creates no artist tags."""
+
+import pytest
+from PIL import Image
+from sqlalchemy import func, select
+
+from backend.app.models import Artist, ImageRecord, ImportSettings, Tag, TagKind
+from backend.app.services.importer import Importer
+from backend.app.services.thumbnailer import Thumbnailer
+
+pytestmark = pytest.mark.integration
+
+
+@pytest.fixture
+def import_layout(tmp_path):
+    import_root = tmp_path / "import"
+    images_root = tmp_path / "images"
+    import_root.mkdir()
+    images_root.mkdir()
+    return import_root, images_root
+
+
+@pytest.fixture
+def importer(db_sync, import_layout):
+    import_root, images_root = import_layout
+    settings = db_sync.execute(
+        select(ImportSettings).where(ImportSettings.id == 1)
+    ).scalar_one()
+    return Importer(
+        session=db_sync, images_root=images_root, import_root=import_root,
+        thumbnailer=Thumbnailer(images_root=images_root), settings=settings,
+    )
+
+
+def _img(path):
+    path.parent.mkdir(parents=True, exist_ok=True)
+    Image.new("RGB", (64, 64), (123, 200, 50)).save(path, "JPEG")
+
+
+def test_folder_import_sets_artist_id_no_tag(importer, import_layout):
+    import_root, _ = import_layout
+    m = import_root / "Alice" / "pic.jpg"
+    _img(m)
+    r = importer.import_one(m)
+    assert r.status == "imported"
+    rec = importer.session.get(ImageRecord, r.image_id)
+    artist = importer.session.execute(
+        select(Artist).where(Artist.slug == "alice")
+    ).scalar_one()
+    assert rec.artist_id == artist.id
+    n_artist_tags = importer.session.execute(
+        select(func.count()).select_from(Tag).where(Tag.kind == TagKind.artist)
+    ).scalar_one()
+    assert n_artist_tags == 0