feat: update unique indices combinator to return array of objects

Add extraction strategy selection and unique indices handling in app.py and FieldMapperAgent. Enhance Planner to accommodate new parameters for execution plans. Update AzureDIService to process tables and save extracted content in both markdown and JSON formats for improved traceability.

Refactor FieldMapperAgent to process entire documents at once, improving efficiency by eliminating page-by-page analysis. Update logging to reflect changes in document processing. Enhance AzureDIService to save extracted content to timestamped files for better traceability.

Refactor AzureDIService to enhance document analysis logging and update table extraction logic. Temporarily disable table extraction and improve content type logging. Update TableAgent to reflect changes in context handling.

Update Dockerfile to use new app entry point and enhance requirements.txt with additional dependencies. Remove obsolete streamlit_app.py file.