added Parallel Function Calling for Structured Data Extraction notebook
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Co-authored-by: Erick Friis <erick@langchain.dev>
Cookbook showing how to incoporate RAG search within a postgreSQL
database using pgvector.
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Co-authored-by: Lance Martin <lance@langchain.dev>
Co-authored-by: Bagatur <baskaryan@gmail.com>
Co-authored-by: Erick Friis <erick@langchain.dev>
