First iteration of RAG enhancements

[debabratamishra]

📋 Description

Improved the document extraction for RAG pipeline

🔧 Type of Change

• 🐛 Bug fix (non-breaking change which fixes an issue)
• ✨ New feature (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to not work as expected)
• 📚 Documentation update
• 🔧 Configuration or build changes
• ♻️ Code refactoring (no functional changes, no API changes)
• 🧪 Test changes

🧪 Testing

• Tested with Docker Hub images
• Tested with build from source
• Tested frontend functionality
• Tested backend API endpoints
• Tested RAG functionality
• Tested with Ollama backend
• Tested with vLLM backend

✅ Checklist

• My code follows the project's style guidelines
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings or errors
• I have tested my changes locally
• Any dependent changes have been merged and published