feat: convert audio with api

Author: DavidsonGomes

.env.example

@@ -250,6 +250,7 @@ S3_USE_SSL=true
 
 # Evolution Audio Converter - Environment variables - https://github.com/EvolutionAPI/evolution-audio-converter
 API_AUDIO_CONVERTER=http://localhost:4040/process-audio
+API_AUDIO_CONVERTER_KEY=429683C4C977415CAAFCCE10F7D57E11
 
 # Define a global apikey to access all instances.
 # OBS: This key must be inserted in the request header to create an instance.