Translate all remaining untranslated strings in the German locale: 228 empty
values plus the genuinely translatable members of the value-equals-key set (240
entries total). Covers webhooks/events, external knowledge sources, context
compaction, terminal servers, OAuth/OIDC claims, skills, and directory
management.
Translations follow the existing locale conventions: formal "Sie" address,
established German terms (Websuche, Wissen, Werkzeuge, Wissensspeicher), and
brand/proper nouns, format names, and identical-in-German words left untouched.
Classic298
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