llm-resolve-ollama-preserves-inner-colons

Summary

When a model string like "ollama:model:tag" is passed to the resolver, it only splits on the first colon to identify the provider, leaving everything after it as the model name. This matters because Ollama model identifiers often contain colons themselves (e.g., "llama3:70b"), and splitting on every colon would break the model name apart.