fix: remove outdated sdk_version to let Hugging Face use latest Gradio 5.x, resolving huggingface_hub import error

fix: wrap python_version in double quotes to prevent YAML float parsing as 3.1

fix: set python_version: 3.10 in Spaces frontmatter to bypass Python 3.13 audioop removal crash

docs: add Hugging Face frontmatter, set research paper title, clarify O(1) decode steps, and sync LLaMA perplexity results

feat: initial release of proactive-cache v0.1.0