refactor: rombak cache AI analisis image — pakai CDN URL langsung, hapus phash+sha
- Cache key image = CDN URL (query params stripped), bukan SHA data URL
→ re-analysis SAME attachment selalu cache-hit, berbeda attachment tidak kolisi
- Hapus perceptual hash (imghash dep + phash get/upsert/compute) sepenuhnya
- Hapus makeImageCacheKey hashing, ganti makeImageCacheKey yang return CDN URL
- textCacheStore, visionAnalyzer, mediaCache, mediaAnalysisClient updated
- imghash dependency removed from package.json
- Purge 82 stale cache rows (image: + phash:) dari DB
asepharyana
d3cb5f6756