List the UPRNs with no SharePoint folder under any root 🟥

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

tests/scripts/test_rename_sharepoint_files.py

@@ -296,6 +296,33 @@ def test_run_warns_once_when_property_missing_from_all_roots(
     assert "400" in warnings[0].message
 
 
+def test_run_summary_lists_uprns_with_no_folder_under_any_root(
+    tmp_path: Path,
+) -> None:
+    # Arrange
+    csv_path = _write_csv(
+        tmp_path, [("400", "4 Elm St", "AA2 2BB"), ("500", "5 Pine Ln", "BB3 3CC")]
+    )
+    found_assessment = _assessment_path(BASE_PATH, "5 Pine Ln", "BB3 3CC")
+
+    sp = MagicMock()
+
+    def fake_get(path: str) -> dict[str, Any]:
+        if path == BASE_PATH:
+            return {"value": []}
+        if path == found_assessment:
+            return {"value": []}
+        raise ValueError("not found")
+
+    sp.get_folders_in_path.side_effect = fake_get
+
+    # Act
+    summary = SharepointRenamerOrchestrator(sp, csv_path).run()
+
+    # Assert
+    assert summary.missing_folders == ["400"]
+
+
 # ---------------------------------------------------------------------------
 # _process_folder — already-canonical files are skipped
 # ---------------------------------------------------------------------------