Add SESSION_DURATION_REMEMBER to docker-compose, .env.example, README env
table, Helm chart (values + configmap passthrough), the Unraid template, and
the Unraid install guide. Where the base SESSION_DURATION was also absent
(README, charts, Unraid) add the pair so the Remember-me variable has context.
Adds the complete TREK documentation wiki covering installation,
trip planning, admin panel, MCP/AI integration, addons, and operations.
Also fixes encrypt-at-rest gaps: mapbox_access_token, Synology
credentials, per-user webhook/ntfy tokens, and photo passphrases
are now rotated by migrate-encryption.ts and stored encrypted via
settingsService.