Fix Higgs Audio CUDA graph crashes on model reload
Implementation:
- Only reset cuda_graphs_initialized flag on unload, minimal intervention
- Let Higgs Audio's natural lazy initialization recreate graphs and caches
- Removed overly aggressive dict clearing that broke generation
- Cleaned up unnecessary debug prints from handler and engine startup
- Updated tooltip to clarify CUDA graphs are now safely manageable
- Removed legacy corruption flag checking in adapter (no longer needed)
This enables safe VRAM unloading with CUDA graphs enabled while preserving
audio quality and generation speed after model recreation.
diodiogod
69c8d7bcee