fix(projekt-matching): use response_format json_schema (vLLM 0.22 ignores guided_json)

projekt-matching/tests/test_llm.py

@@ -25,18 +25,14 @@ def test_chat_json_strips_think_and_parses():
     assert out == {"a": 1}
     body = p.call_args.kwargs["json"]
     assert "max_tokens" not in body
-    assert body["guided_json"] == {"type": "object"}
+    assert body["response_format"]["json_schema"]["schema"] == {"type": "object"}
 
 
-def test_chat_json_fallback_to_response_format():
-    bad = mock.Mock(status_code=400,
-                    text="Unknown parameter: 'guided_json'")
-    good = mock.Mock(status_code=200)
-    good.json.return_value = {"choices": [{"message": {"content": "{}"}}]}
-    with mock.patch("projektmatch.llm.requests.post",
-                    mock.Mock(side_effect=[bad, good])) as p:
-        assert llm.chat_json("http://v/v1", "m", [], {"type": "object"}) == {}
-    assert "response_format" in p.call_args.kwargs["json"]
+def test_chat_json_strips_markdown_fences():
+    content = "```json\n{\"a\": 2}\n```"
+    with mock.patch("projektmatch.llm.requests.post", fake_post([content])):
+        out = llm.chat_json("http://v/v1", "m", [], {"type": "object"})
+    assert out == {"a": 2}
 
 
 def test_match_cv_retries_on_missing_nr_then_raises():