Optimized PDF Vectorization Process for Chat with PDF demo app

• Implemented batch embedding for improved performance and efficiency during vectorization.

• Enhanced error handling and input validation to ensure smoother processing and better stability.

• Improved text sanitization to handle non-printable characters while preserving common whitespace.

• Added detailed logging for easier debugging and tracking issues during processing.

• Optimized the Supabase insertion process for better database performance.
  
  

These changes should improve the reliability and efficiency of the PDF vectorization workflow.