feat(api): use Tencent 16k_zh_large ASR and remove local Whisper

Standardize ASR on Tencent's dialect-capable engine across all environments,
drop faster-whisper from dependencies and deployment images, and add an
expo-sqlite iOS vendor sync plus pod install in prebuild to prevent native
build failures after npm install.

Co-authored-by: Cursor <cursoragent@cursor.com>

app-expo/scripts/ios-prebuild.sh

@@ -47,6 +47,10 @@ done
 echo "==> expo prebuild --platform ios --clean"
 npx expo prebuild --platform ios --clean
 
+echo "==> ensure expo-sqlite native sources + pod install"
+node scripts/ensure-expo-sqlite-ios.js
+(cd ios && pod install)
+
 shopt -s nullglob
 WORKSPACES=(ios/*.xcworkspace)
 shopt -u nullglob