Ingest schedule (#391)

Includes a new "app" running the ingestion jobs (aka fetch_news and
find_missing_companies + enrich_company_financials) on a schedule.

This also fixes an issue with the previous schedule implementation by
persisting the schedule in a file that survives new deployment and
continues where it left off.

tests/apps/ingest_test.py

@@ -0,0 +1,41 @@
+"""Testing apps/ingest.py."""
+import json
+import tempfile
+from unittest.mock import Mock, patch
+
+from aki_prj23_transparenzregister.apps import ingest
+
+
+def test_import() -> None:
+    assert ingest
+
+
+def test_load_schedule() -> None:
+    with tempfile.TemporaryDirectory() as temp_dir:
+        data = {"test": "test"}
+        path = f"{temp_dir}/schedule.json"
+        with open(path, "w") as file:
+            json.dump({"test": "test"}, file)
+        assert ingest.load_schedule(path) == data
+
+
+def test_load_scheduler_no_result() -> None:
+    assert ingest.load_schedule("./hello_there.json") == {}
+
+
+def test_save_schedule() -> None:
+    with tempfile.TemporaryDirectory() as temp_dir:
+        data = {"test": "test"}
+        path = f"{temp_dir}/schedule.json"
+
+        ingest.save_schedule(data, path)
+        with open(path) as file:
+            assert json.load(file) == data
+
+
+@patch("aki_prj23_transparenzregister.apps.ingest.find_missing_companies_main")
+@patch("aki_prj23_transparenzregister.apps.ingest.enrich_company_financials_main")
+def test_main(mock_financials: Mock, mock_find_missing: Mock) -> None:
+    ingest.main(Mock())
+    assert mock_financials.called
+    assert mock_find_missing.called