fix(backend): bundle unidic-lite for misaki Japanese G2P (#514)

fugashi (pulled in by misaki[ja]) needs a MeCab dictionary at runtime.
The `unidic` package that ships today contains no data — it relies on
`python -m unidic download` (~526MB), which isn't run by `just setup`
and won't survive PyInstaller freezing.

Switch to `unidic-lite`, which bundles a MeCab-compatible dict inside
the wheel (~50MB). Collect its data files in build_binary.py so frozen
builds also pick up the dicdir. Same failure mode and same fix shape as
the existing en_core_web_sm pre-install.

.github/workflows/release.yml

@@ -226,46 +226,6 @@ jobs:
           args: ${{ matrix.args }}
           includeUpdaterJson: true
 
-      # Tauri's bundler signs the .app and notarizes it, but the .dmg wrapper
-      # ships unnotarized. Gatekeeper rejects that on macOS 15 Sequoia (caught
-      # by Homebrew Cask CI) and causes "app isn't signed" dialogs on older
-      # Intel Macs when Apple's notarization servers are slow (see issue #509).
-      # Submit the .dmg to notarytool, staple the ticket, and overwrite the
-      # release asset uploaded by tauri-action.
-      - name: Notarize and staple DMG (macOS)
-        if: matrix.platform == 'macos-latest' || matrix.platform == 'macos-15-intel'
-        env:
-          APPLE_API_KEY_ID: ${{ secrets.APPLE_API_KEY }}
-          APPLE_API_ISSUER: ${{ secrets.APPLE_API_ISSUER }}
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: |
-          set -euo pipefail
-          KEY_PATH="$HOME/.appstoreconnect/private_keys/AuthKey_${APPLE_API_KEY_ID}.p8"
-          TARGET=$(echo "${{ matrix.args }}" | sed -n 's/.*--target \([a-z0-9_-]*\).*/\1/p')
-          DMG_DIR="tauri/src-tauri/target/${TARGET}/release/bundle/dmg"
-          # Match the release tag tauri-action resolved from tauri.conf.json's
-          # version field; GITHUB_REF_NAME is a branch name under workflow_dispatch.
-          RELEASE_TAG="v$(jq -r '.version' tauri/src-tauri/tauri.conf.json)"
-          shopt -s nullglob
-          dmgs=("${DMG_DIR}"/*.dmg)
-          if [ ${#dmgs[@]} -eq 0 ]; then
-            echo "::error::No DMGs found in ${DMG_DIR} — tauri bundler output path may have changed"
-            exit 1
-          fi
-          for dmg in "${dmgs[@]}"; do
-            echo "::group::Notarize $(basename "$dmg")"
-            xcrun notarytool submit "$dmg" \
-              --key "$KEY_PATH" \
-              --key-id "$APPLE_API_KEY_ID" \
-              --issuer "$APPLE_API_ISSUER" \
-              --wait --timeout 20m
-            xcrun stapler staple "$dmg"
-            spctl -a -t open --context context:primary-signature -vv "$dmg"
-            gh release upload "${RELEASE_TAG}" "$dmg" --clobber \
-              --repo "${GITHUB_REPOSITORY}"
-            echo "::endgroup::"
-          done
-
   build-cuda-windows:
     runs-on: windows-latest
     permissions: