New endpoints: /antonyms, /backing, /pronunciation, /etymology with difficulty
scoring on /random. Cross-language synset backing links French/Portuguese words
to English equivalents via WordNet 3.0 synset IDs (matching WOLF and OMW offsets).
New loaders: Hunspell affix expansion (fr, pt-PT), English programmatic inflector,
CMU Pronouncing Dictionary, SUBTLEX-US frequency, CETEMPúblico frequency,
Open Multilingual Wordnet (Portuguese), and SQL-based difficulty scoring.
Schema v2 adds tables: antonyms, synsets, word_synsets, pronunciations, etymology
with migration support for existing databases.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Add CC-CEDICT loader and Wiktionary Chinese as data sources for
Mandarin. Also fix all Wiktionary download sections to retain
compressed archives and save checksums for integrity verification.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
