[cli] unable to register embedding model

[mattf]

System Info

n/a

Information

• The official example scripts
• My own modified scripts

🐛 Describe the bug

llama-stack-client models register all-MiniLM-L6-v2 --provider-model-id all-minilm:latest

all-MiniLM-L6-v2/all-minilm:latest is an embedding model available with ollama, see https://ollama.com/library/all-minilm

the registration request does not include model_type, see https://github.com/meta-llama/llama-stack/blob/main/docs/_static/llama-stack-spec.yaml#L4865 and https://github.com/meta-llama/llama-stack-client-python/blob/main/src/llama_stack_client/lib/cli/models/models.py#L104, which defaults to llm

Error logs

n/a

Expected behavior

expect an option to indicate the model being registered is for embedding