v0.1.1

Added

• End-to-end tests using real package managers (dnf, apt, pacman) in containers via make e2e
• ubuntu-security repository in default configuration

Changed

• Cache-miss responses are now streamed directly to a temp file on disk instead of being buffered in memory, eliminating memory spikes for large packages
• Content-Length is validated before committing cached files, preventing truncated upstream responses from being cached
• Client disconnects no longer prevent caching — if a client aborts mid-download, the upstream response is still fully received and cached
• Landing page snippets for Debian/Ubuntu use <release> placeholder instead of hardcoded codenames
• README client configuration examples updated to current stable releases (Debian trixie, Ubuntu noble)