Added PDF Ingestion Improvements

The PDF ingestion system was revised so that documents are extracted, normalized, chunked, validated, previewed, stored, and indexed through one consistent production pipeline. (Better PDF PRocessing overall)

Added TTS benchmark tools

Tools were added for Text To Speech benchmarking.

Centralized runtime config defaults

All config values are centralized for a more organized functionality.

Added AI model warmup

All used models during a session are now warmed up from start for faster responses.