Bump Gradio to 5.x for Python 3.13 compatibility

Bind Gradio to 0.0.0.0:7860 for HF Space proxy

Pin Python 3.12 + audioop-lts fallback for pydub on 3.13

Switch base model to Qwen2.5-Coder-0.5B (matches LoRA training)

Use torch >= 2.5 for Space's Python 3.13 base image

Initial Gradio CPU demo (base + LoRA fallback to base)

initial commit