Yoni

### Describe the bug Retrieving existing collection ignores custom embedding_function when using ChromaVectorDB. ### Steps to reproduce Setup custom embedding function: ``` embeeding_function = embedding_functions.OpenAIEmbeddingFunction( api_key="__localai__", api_base="http://localhost:8080/v1", model_name="bert-minilm-embedding" ) rag_vector_db...