fix final_answer_model in members.py to use the model configuration provided by user to resolve issues with configuration inconsistency between member models & final model.
This resolves issues where a user may specify the ollama model or any model that requires custom parameters like "base_url" that fail to be properly configured in the final_answer_model object thus resulting in errors (potentially due to final_answer_model resolving the wrong model to be used or due to it using defaults due to missing parameter configurations).
fix final_answer_model in members.py to use the model configuration provided by user to resolve issues with configuration inconsistency between member models & final model.
This resolves issues where a user may specify the ollama model or any model that requires custom parameters like "base_url" that fail to be properly configured in the final_answer_model object thus resulting in errors (potentially due to final_answer_model resolving the wrong model to be used or due to it using defaults due to missing parameter configurations).