Guard release, publish, wiki-deploy and issue/PR-triage workflows with a
`github.repository` check so they no-op in forks instead of failing or
acting on the fork's own issues, PRs, tags and registries.
Also skip the Docker Scout scan for pull requests from forks: Docker Hub
secrets are never exposed there, so the login step could not succeed.
Tests and lint stay ungated — they need no secrets and are the gate for
incoming fork PRs.
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.