Phase 6 deployment infrastructure: finalize Dockerfile with OCI labels,
improve .env.example with grouped config keys, add scripts/pull-models.sh
for Mac-side model setup, and add docs/deploy.md covering the full
deployment topology, prerequisites, security model, and troubleshooting.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>