Introduce asynchronous transcription with concurrency limits and a verification script

Enhance audio processing with `ffprobe` and WAV,

Added `setup_whisper.sh` to automate building and installing `whisper-cli`, update transcription utility to use it, and revise installation instructions.

Test Added and some user route updated

v3 download model added

GDRIVE download link added

model parameter added

Updated v3

Added Transcribe support

things gonna change

error removed and code improved