[Audio] Bug fixes and usability enhacements

Some bug fixes and usability enhancements

• We added better filtering to our sound templates, thanks to Pascal who pointed out this bug and we fixed it:construction_worker:
• We made some security improvements to enhance customer trust!
• We fixed a bug in correct MIME type of uploaded audio in our Audio Engine 🐛

Voice Intelligence Layer updates

We're continuously working on our Voice Intelligence Layer.

• We fixed some 11labs errors and artefacts when script texts are long 🐛 Thanks to our customers for pointing this out 💯
• Allows to process long scripts as each section is fragmented in several sections when necessary. This means longer scripts will be processed faster no timeouts 💯