When Ollama responds successfully but returns zero models (e.g. on Linux
with the bundled `ollama-stub.service`), `discoverOllamaModels` was
logging at `warn` level:
[agents/model-providers] No Ollama models found on local instance
This appeared on every agent invocation even when Ollama was not
intentionally configured, polluting production logs. An empty model
list is a normal operational state — it warrants at most a debug
note, not a warning.
Fix: change `log.warn` → `log.debug` for the zero-models branch.
The error paths (HTTP failure, fetch exception) remain at `warn`
since those indicate genuine connectivity problems.
Closes#26354
d911b0254d