Add README.md with module overview

Add Module 4: Assembling the Agentic Retrieval System

Add Module 3: Building the Graph Retrieval Tool

Add Module 2: Knowledge Graph Construction & Embedding notebook

Update contract data files: Contract_01_Transportation and Contract_04_Distributor

Rename module-1-data-extraction to module-1 and update notebook filename

Add module-1 data extraction and README, exclude module-2

fixed module-1 invalid notebook issue

fixed module-1 invalid notebook issue

Fix JSON syntax error in solution_rag_evaluation.ipynb - add missing closing brace in metadata section

module 4 files

module-3 solution file fix

module-3 solution file fix

module-3 solution file

updated module-2 guided notebook