Extends archival beyond events/persons/cohorts. New generic resource
archiver (posthog-resource-archive@*/6h) snapshots surveys, feature flags,
experiments, dashboards, insights, annotations, and actions into
posthog_resource_snapshots — change-detected (hash over non-volatile config),
lossless `data` payload — and dumps a full per-type daily copy to MinIO
(resources/<type>/<date>.json.gz). listResource() pages any PostHog REST
resource. Survey responses + flag calls are already captured as events.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>