chore: fix ios e2e workflow; upgrade to Xcode 16.4

.github/workflows/mobile-e2e.yml

@@ -7,7 +7,6 @@ env:
   ANDROID_NDK_VERSION: 27.0.11718014
   # Cache versions
   GH_CACHE_VERSION: v1 # Global cache version
-  GH_GEMS_CACHE_VERSION: v1 # Ruby gems cache version
   # Performance optimizations
   GRADLE_OPTS: -Dorg.gradle.daemon=false -Dorg.gradle.workers.max=4 -Dorg.gradle.parallel=true -Dorg.gradle.configureondemand=true -Dorg.gradle.caching=true
   CI: true
@@ -184,13 +183,10 @@ jobs:
       - run: corepack enable
       - run: corepack prepare [email protected] --activate
       - name: Cache Yarn dependencies
-        uses: actions/cache@v4
+        uses: ./.github/actions/cache-yarn
         with:
-          path: .yarn/cache
-          key: ${{ runner.os }}-node-${{ env.NODE_VERSION_SANITIZED }}-yarn-${{ hashFiles('**/yarn.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-node-${{ env.NODE_VERSION_SANITIZED }}-yarn-
-      - run: yarn install --immutable --silent
+          cache-version: ${{ env.GH_CACHE_VERSION }}-${{ env.NODE_VERSION_SANITIZED }}
+      - run: yarn workspaces focus @selfxyz/mobile-app --mode=skip-build --silent
       - name: Cache Maestro
         id: cache-maestro
         uses: actions/cache@v4
@@ -202,57 +198,20 @@ jobs:
         run: curl -Ls "https://get.maestro.mobile.dev" | bash
       - name: Add Maestro to path
         run: echo "$HOME/.maestro/bin" >> "$GITHUB_PATH"
-      - name: Set up Xcode
-        uses: maxim-lobanov/setup-xcode@v1
-        with:
-          xcode-version: "16.4"
       - name: Cache Node modules
         uses: actions/cache@v4
         with:
           path: app/node_modules
           key: ${{ runner.os }}-node-${{ env.NODE_VERSION_SANITIZED }}-${{ hashFiles('app/yarn.lock') }}
           restore-keys: |
             ${{ runner.os }}-node-${{ env.NODE_VERSION_SANITIZED }}-
-      - name: Cache Ruby gems
-        uses: ./.github/actions/cache-bundler
-        with:
-          path: app/vendor/bundle
-          lock-file: app/Gemfile.lock
-          cache-version: ${{ env.GH_CACHE_VERSION }}-${{ env.GH_GEMS_CACHE_VERSION }}-ruby${{ env.RUBY_VERSION }}
       - name: Cache Pods
         uses: ./.github/actions/cache-pods
         with:
           path: |
             app/ios/Pods
             ~/Library/Caches/CocoaPods
           lock-file: app/ios/Podfile.lock
-      - name: Cache Xcode build
-        uses: actions/cache@v4
-        with:
-          path: |
-            app/ios/build
-            ~/Library/Developer/Xcode/DerivedData
-            ~/Library/Caches/com.apple.dt.Xcode
-          key: ${{ runner.os }}-xcode-${{ hashFiles('app/ios/Podfile.lock') }}-${{ hashFiles('app/ios/OpenPassport.xcworkspace/contents.xcworkspacedata') }}
-          restore-keys: |
-            ${{ runner.os }}-xcode-${{ hashFiles('app/ios/Podfile.lock') }}-
-            ${{ runner.os }}-xcode-
-      - name: Cache Xcode Index
-        uses: actions/cache@v4
-        with:
-          path: app/ios/build/Index.noindex
-          key: ${{ runner.os }}-xcode-index-${{ hashFiles('app/ios/Podfile.lock') }}
-          restore-keys: |
-            ${{ runner.os }}-xcode-index-
-      - name: Cache iOS Simulator
-        uses: actions/cache@v4
-        with:
-          path: |
-            ~/Library/Developer/CoreSimulator/Devices
-            ~/Library/Developer/Xcode/iOS DeviceSupport
-          key: ${{ runner.os }}-simulator-v1
-          restore-keys: |
-            ${{ runner.os }}-simulator-
       - name: Install iOS Runtime
         run: |
           echo "📱 Checking iOS Runtime availability..."