fix(tests): provide model name in Codex 401 refresh tests for CI

CI has no config.yaml, so cron/gateway resolve an empty model name.
The Codex Responses validator rejects empty models before the mock
API call is reached. Provide explicit model in job dict and env var.

tests/test_codex_execution_paths.py

@@ -112,7 +112,7 @@ def test_cron_run_job_codex_path_handles_internal_401_refresh(monkeypatch):
     _Codex401ThenSuccessAgent.last_init = {}
 
     success, output, final_response, error = cron_scheduler.run_job(
-        {"id": "job-1", "name": "Codex Refresh Test", "prompt": "ping"}
+        {"id": "job-1", "name": "Codex Refresh Test", "prompt": "ping", "model": "gpt-5.3-codex"}
     )
 
     assert success is True
@@ -139,6 +139,7 @@ def test_gateway_run_agent_codex_path_handles_internal_401_refresh(monkeypatch):
         },
     )
     monkeypatch.setenv("HERMES_TOOL_PROGRESS", "false")
+    monkeypatch.setenv("HERMES_MODEL", "gpt-5.3-codex")
 
     _Codex401ThenSuccessAgent.refresh_attempts = 0
     _Codex401ThenSuccessAgent.last_init = {}