Defines a per-model capability matrix for all 10 target models across anthropic, openai, zai, and ollama providers. Adds the ModelCapability interface to @mosaic/types and exports lookup helpers (getModelCapability, findModelsByCapability, getModelsByProvider, getAllModels) from the gateway agent module to support capability-aware routing. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>