- Updated Codex model pricing data to include non-zero input/output/cacheRead rates.
- Added generate-models fallback to copy billable OpenAI costs into bundled openai-codex models.
- Added catalog-cost helpers to fallback openai-codex pricing to openai and compute token totals.
- Added regression tests for openai-codex cost parity and db backfill, and documented the fix in changelog.