Drop the four deleted-page entries (Ceph, Infrastructure, Recovery,
Workloads) from REQUIRED_PAGE_HEADERS since those pages were retired
in the rc.6 IA revert.
Add PlatformSectionTabs to HEADER_PRIMITIVES. The post-rc.6
platform-shaped top-level pages (Proxmox, Docker, Kubernetes,
TrueNAS, Vmware, Standalone) use PlatformSectionTabs from
features/platformPage/sharedPlatformPage as their canonical chrome
rather than PageHeader; the audit was missing this recognition,
causing Docker/Kubernetes/Standalone/TrueNAS to fail with 'must use
at least one shared header primitive' while Proxmox and Vmware
passed only by accidentally reaching SectionHeader through their
WorkloadsSurface->WorkloadsTable->ErrorBoundary import chain.
rcourtman