Switch docker-compose.yml from bind mount to a named volume (patent_data)
so downloaded PDFs survive container recreation. Add a "Patent PDF Storage"
section to DEPLOYMENT.md covering Docker Compose, Kubernetes PVC, and S3
alternatives.
Closesleeworks-agents/SPARC#1360
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>