Festinger now extracts provider/model/api-key from every intercepted
request and passes it to the context-discover queue as a fallback_model.
_process_context_discover uses it when write_model_id is not configured,
so Agent0's current model (LM Studio, Ollama, Anthropic) is automatically
reused for utility LLM calls without any extra setup.
Priority: write_model_id (explicit override) > fallback_model (request mirror)
Also updates upstream_openai default in config.yaml to LM Studio's
local address (host.docker.internal:1234).
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>