DEEPGRAM_API_KEY=your_deepgram_key CARTESIA_API_KEY=your_cartesia_key OPENAI_API_KEY=your_openai_key # Set to any value to enable tracing ENABLE_TRACING=true # OTLP endpoint (change to us.cloud.langfuse.com if you use the US data region) OTEL_EXPORTER_OTLP_ENDPOINT=http://cloud.langfuse.com/api/public/otel OTEL_EXPORTER_OTLP_HEADERS=Authorization=Basic%20 # Set to any value to enable console output for debugging # OTEL_CONSOLE_EXPORT=true