## What changed
- Recognize `misalignment_policy_violation` errors from response streams and HTTP 400 or 403 responses.
- Preserve the upstream message, use a fallback for blank messages, and treat the error as non-retryable.
- Expose `misalignmentPolicyViolation` through the app-server protocol and generated schemas so turns fail with a typed terminal error.
## Testing
- Cover streamed and HTTP policy violations, fallback messages, retry behavior, and app-server turn completion.
GitOrigin-RevId: fd3485bf0be7bfe3d51c078bbc36a081692fd57f
# External (non-OpenAI) Pull Request Requirements
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If your PR conforms to our contribution guidelines, replace this text
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Include a link to a bug report or enhancement request.
**Goal**: Prevent response.failed events with `invalid_prompt` from
being treated as retryable errors so the UI shows the actual error
message instead of continually retrying.
**Before**: Codex would continue to retry despite the prompt being
marked as disallowed
**After**: Codex will stop retrying once prompt is marked disallowed
