Match the new HellionChat comment-length convention: 1-3 lines for
standard pitfall notes, 5+ only for non-trivial workarounds. The
previous Dispose comment was 14 lines of textbook prose, which veered
into AI-slop territory and would rot on the next refactor.
PendingSync läuft jetzt als LinkedList (O(1) Last statt O(n) Linq-Last
im ContentIdResolverHook); Privacy-Filter-Drop-Log auf Verbose runter,
sodass der Default-xllog-Stream nicht mehr pro Nachricht spammt.