- Bump golang.org/x/{net,crypto,sys,text,term} to latest patches to
clear GHSA module advisories flagged by Docker Scout.
- Add Docker Scout CVE gate to the release workflow (fails only on
FIXABLE critical/high; unfixed upstream ffmpeg codec CVEs are accepted
and documented in SECURITY.md).
- Add weekly + manual docker-rebuild workflow so newly fixed base/
ffmpeg/Go patches land on :latest between tagged releases.
- Document container image vuln-scanning policy and hardening in
SECURITY.md.
