v0.8.2

Install experience

• brew install omni now shows uv's progress (resolve, download, build) instead of sitting silent for minutes, and caches wheels in Homebrew's cache dir. A reinstall or upgrade drops from about 2m20s to about 30s.
• install.sh prints an elapsed-time line every 20s during the quiet git clone and build steps, and raises uv's download timeout to 120s so large torch wheels survive slow links.