v6.1.3

Summary

• Published oc-codex-multi-auth@6.1.3 to npm with the latest dist-tag.
• Added explicit GPT-5.5 Fast aliases and scoped GPT-5.5 -> GPT-5.4 auto-fallback.
• Removed GPT-5.5 Pro routing/config entries because GPT-5.5 Pro is ChatGPT-only, not Codex.
• Fixed unsupported-model pool exhaustion messaging and the Auth import typecheck regression.

Verification

• npm run typecheck
• npm publish
• PR #142 merged
• PR #143 merged