Introduces the tenderRadar top-level namespace in de.json/en.json covering
page, results, filter (incl. Bundesland/CPV division labels), savedSearch,
detail, coverage, settings, sourceConfig, rssFeeds and emailAlerts groups.
EN translations authored with consistent Vergabe-domain terminology
(Ausschreibung->tender, Vergabestelle->contracting authority, Frist->
deadline, Auftragswert->estimated value). tenderRadar-parity.spec.ts
enforces recursively-flattened de/en key-set equality so no follow-up edit
can silently add a string to only one locale.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
