Добавлена отправка накладных на почту

tests/controllers/v1/test_init_payment.py

@@ -84,6 +84,19 @@ def test_post_init_payment_rejects_snake_case_top_level_field() -> None:
     assert service.calls == []
 
 
+def test_post_init_payment_rejects_invalid_account_email() -> None:
+    service = StubAggregatorService(response=None)
+    app = create_app()
+    _install_service_override(app, service)
+    invalid_payload = make_init_payment_payload()
+    invalid_payload["accountEmail"] = "not-an-email"
+
+    response = _post(app, invalid_payload)
+
+    assert response.status_code == 422
+    assert service.calls == []
+
+
 def test_post_init_payment_rejects_snake_case_nested_address_field() -> None:
     service = StubAggregatorService(response=None)
     app = create_app()