Real bad-model turn: relay returns 404, codex retries sampling
5 times, turn fails, but app-server's turn/completed event
carries status=failed with NO error and NO text, so worker
never saw any fallbackable signal. The 404 actually lives in
codex's thread_history_1.sqlite (thread_turns.error_json).
host.py Server.run_turn now best-effort recovers that message
(read-only query by thread_id+turn_id, any failure -> None,
never breaks the turn itself), and dispatch CLI prints the
error field (run CLI already printed the full result). Worker
_attempt_error prefers the error field when text is empty, so
a double failure keeps the real reasons, not just status codes.
Tests: host TurnErrorFromHistoryTest (recovery + missing/corrupt
DB -> None), full host + cloud suites pass.
Extend the verify job with a second step running cloud tests, so
CI covers both suites (host 27 + cloud 223, both passing locally
outside the model sandbox; the 40 socket failures reported inside
the sandbox were sandbox artifacts, not code failures).
Generator (host.py HOST_VERIFY_WORKFLOW) and generated workflow
were updated together; template matches the generated file.
host