Replace direct torchaudio.load() calls with safe_load_audio() utility in
AudioAnalyzer.load_audio() to handle PyTorch 2.9 TorchCodec DLL errors and
int16 normalization automatically.
Fixes 'Could not load libtorchcodec' error when using 🌊 Audio Wave Analyzer
node with Character Voices or direct audio input on PyTorch 2.9.0+cu128.