OLLAMA base url general changeable

It would be create if you can set for all ollama models the base path in ChainForge models so you not need to do it for each model individually.

Start by locating ChainForge's Ollama model configuration and how each model currently receives its base URL. Confirm how shared model settings are represented, then make the global setting apply to all Ollama models without requiring individual edits. Done means every Ollama model uses the shared base path unless explicitly overridden.

Written by the indexing model from the issue text.