Abri amend_job surfaces OpenHousing rejections with code and message verbatim 🟩

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

tests/abri/abri_relay_amendoptiappt_relayerror_response.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<response>
+    <success>false</success>
+    <code>RelayError</code>
+    <message>Job_no 1019905 is invalid. Job not found.</message>
+</response>

tests/infrastructure/abri/test_abri_client.py

@@ -272,3 +272,24 @@ def test_amend_job_omits_the_resource_parameter_when_no_surveyor_is_provided(
         for parameter in ET.fromstring(sent_body).findall(".//Parameters")
     ]
     assert "resource" not in sent_attributes
+
+
+# --- amend_job: rejection ---
+
+
+def test_amend_job_returns_rejection_with_openhousing_error_code_and_message_verbatim(
+    client: AbriClient, mock_session: MagicMock
+) -> None:
+    # Arrange
+    mock_session.post.return_value.content = _load_fixture(
+        "abri_relay_amendoptiappt_relayerror_response.xml"
+    )
+
+    # Act
+    result = client.amend_job(_spec_example_amend_request())
+
+    # Assert
+    assert result == AbriRequestRejected(
+        code="RelayError",
+        message="Job_no 1019905 is invalid. Job not found.",
+    )