embed

The format can vary:

• ":<model_name>" for recognized providers (e.g., "openai:text-embedding-3-large")
• "path/to/module.py:function_name" for your own local embedding function
• "my_custom_embed" if it's a known alias in your system

Examples: - "openai:text-embedding-3-large" - "cohere:embed-multilingual-v3.0" - "src/app.py:embeddings"

Note: Must return embeddings of dimension dims.