feat: Implement unmute.sh streaming STT methodology v0.7.0

fix: Add PyTorch dependencies and fix base64 imports v0.5.7

temp: Update WebSocket URLs to standard port 7860

feat: Add enhanced TTS connection error handling and diagnostics

fix: Update STT WebSocket URL to use port 7861

feat: Deploy complete VoiceCal application with all files v0.5.6