AI_TEXT_MODEL and AI_VISION_MODEL now point to the Mistral vars by default.
SERP_API_KEY removed. All docker-compose services load .env.local as an
optional overlay so local credentials don't have to go into .env.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Implements OllamaClientInterface against the Mistral Cloud API
(/v1/chat/completions). Switch by toggling the alias in services.yaml
and pointing AI_TEXT_MODEL / AI_VISION_MODEL env vars at the MISTRAL_*
or OLLAMA_* counterparts.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>