## 1. Implementation
- [x] 1.1 Route backend `/backend-api/codex/responses` HTTP through the existing HTTP responses bridge
- [x] 1.2 Preserve Codex session affinity and transport logging contracts on the backend HTTP path

## 2. Verification
- [x] 2.1 Add backend-specific HTTP bridge integration coverage
- [x] 2.2 Validate responses compatibility specs
