docs/vs-nfd/90-restrisiken.md: nine entries, each with risk, why it is
accepted, compensating control and decider — unmarked attachment
content (#212), local auth not yet switchable incl. the open runtime-
flippability question (#216), deferred plugin hash pinning (#232), the
one-time git-history secret check with its pattern caveat (#198),
digest-mail titles (I-23, revisit M32), page_links slug residue (I-24),
the IndexedDB endpoint copy (I-25), deliberately unscheduled features,
and the Site-Admin read bypass. Binding same-PR maintenance rule
stated; referenced from the delimitation statement and consumed by the
Grundschutz mapping.
Co-Authored-By: Claude Fable 5 (1M context) <noreply@anthropic.com>