Pin encrypted backups and AI-generated files to Kubo (ipfs.jeffemmett.com)
as fire-and-forget redundancy. Filesystem remains primary storage — IPFS
failures are logged and swallowed. Adds /api/ipfs routes for status,
pin/unpin, and gateway proxy.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
