"Unlocked RAG magic: LangChain, OpenSearch, IBM embeddings, Fireworks AI LLM. Build intelligent apps! #AI #RAG #DevCommunity" https://zilliz.com/tutorials/rag/langchain-and-opensearch-and-fireworks-ai-deepseek-r1-distill-qwen-7b-and-ibm-all-minilm-l6-v2