- Add missing year, source, and authorBio fields to all quotes
- Fix incorrect weis-1 quote (was Konfuzius, now Laozi with Tao Te King)
- Add new quotes: weis-9 (Konfuzius), liebe-6 (Saint-Exupéry), leben-7 (Horaz),
erfolg-5/6 (Goethe, Sassoon), glueck-6 (Aristoteles), freund-5 (Cicero),
mut-6 (Vergil), hoff-4/5 (Tutu, Cicero), natur-5/6 (Muir, Heraklit)
- Total: 60 quotes with complete multilingual metadata
- All author bios now include birth/death years
- Add 6-language support: original, de, en, it, fr, es
- Add quote metadata: source, year, tags, imageUrl, authorBio, verified
- Add originalLanguage field to preserve original quote language (la, el, zh, sa, etc.)
- Update all 50 quotes with full translations and metadata
- Add new utility functions: getQuoteText, getQuotesByTag, getAllTags,
getQuotesByAuthor, getVerifiedQuotes, getQuotesByYearRange,
getQuotesByOriginalLanguage
- Update matrix-zitare-bot to use new multilingual schema