- Add OPENROUTER_SHORT_TO_API_MODEL_ID map for short model refs like
openrouter/deepseek-v4-flash that OpenClaw surfaces but OpenRouter API
expects as deepseek/deepseek-v4-flash.
- In normalizeOpenRouterApiModelId, expand short refs before falling back
to the existing namespaced strip logic.
- Add unit tests covering short refs, long refs, native routes, and
pass-through cases.
- Add standalone reproduction script that verifies all normalization cases.