Manifest 6.22.0 gives custom providers readable aliases in /v1/models and adds a self-hosted update check

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Released 2026-09-04, custom providers now publish models under a readable prefix (`vercel-ai-gateway/alibaba/qwen-3-14b` instead of `custom:<uuid>/alibaba/qwen-3-14b`), with the alias defaulting to the provider name, editable later, backfilled on upgrade, and the proxy accepting both forms so existing client configs keep working. It also adds an Automation harness category with n8n as its first platform, and `GET /api/v1/version` reporting the running version, the latest GitHub release and upgrade links, checked once a day, never in cloud mode, disabled with `MANIFEST_UPDATE_CHECK_DISABLED=1`.