feat(attachments): scan enumerates all; import_file maps 'attached' + member ML

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

tests/test_import_file_attached.py

@@ -0,0 +1,24 @@
+"""FC-2d-iii: import_file maps 'attached' + enqueues ML for members."""
+
+import pytest
+
+from backend.app.services.importer import ImportResult
+from backend.app.tasks.import_file import _map_result_to_status
+
+pytestmark = pytest.mark.integration  # imports the celery app graph
+
+
+def test_attached_maps_to_complete_no_requeue():
+    status, requeue = _map_result_to_status(
+        ImportResult(status="attached")
+    )
+    assert status == "complete"
+    assert requeue is False
+
+
+def test_imported_still_requeues():
+    status, requeue = _map_result_to_status(
+        ImportResult(status="imported", image_id=5)
+    )
+    assert status == "complete"
+    assert requeue is True