Improve Docker Swarm deployment for production use

docker-compose.yml:
- Remove 'name' property (unsupported by docker stack deploy)
- Use host mode for ports (required for WireGuard/VPN interfaces)
- Set HOSTNAME=0.0.0.0 via command (Docker overrides env var with container ID)
- Adjust healthcheck intervals (30s interval, 60s start period)

deploy-swarm.sh:
- Auto-initialize Swarm with localhost-only binding (127.0.0.1)
- Force service update after deploy to prevent config caching issues

.env.wallet.example:
- Remove OIDC config (wallet has no OIDC routes, only blog acts as provider)
- Remove chat integration (minimizes attack surface for active key operations)

LinkSanitizer.ts:
- Comment out broken debug log that spams without showing values