- Truncate object keys to 40 chars (was 80) at underscore boundary
- Strip German qualifying prepositional phrases (bei/für/gemäß/von/zur/...)
- Add 65 new synonym mappings for near-duplicate patterns found in analysis
- Strip trailing noise tokens (articles/prepositions)
- Add _truncate_at_boundary() helper and _QUALIFYING_PHRASE_RE regex
- 11 new tests for normalization improvements (227 total pass)
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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