The hub.docker.com/r/palashdeb/omnivoice-studio overview was managed by
hand and had gone stale (stuck at the sha-f86beb0 era, missing the tag
table, audiobook/long-form, Supertonic-3, server-mode networking notes).
Add deploy/dockerhub-overview.md as the source of truth and a
peter-evans/dockerhub-description step in docker.yml that pushes it to
Docker Hub on main pushes. Gated identically to the image push: only when
DOCKERHUB_TOKEN is set, so forks / GHCR-only runs are unaffected.
Overview adds the :latest=preview / :stable=release tag semantics (matching
docs/install/docker.md), the current feature set, server-mode + LAN
networking notes, and shields badges. Short description is 98/100 chars.
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
