ci: run independent setup steps in parallel

Use the GitHub Actions parallel-steps feature (2026-06-25) to group
setup steps with no dependency between them: checkout, toolchains
(Bun/JDK/Xcode), the EAS CLI install and the disk-space cleanup now run
concurrently, and the Bun/Gradle cache restores overlap. On the iOS
jobs, Xcode/EAS setup previously ran after the ~2 min prebuild despite
not needing it.

Also in release.yml: queue successive release runs in order
(queue: max) instead of dropping the extra pending run, and fix the
expo-github-action pin comment (the pinned SHA is tag v9.0.0, not
main).

.github/workflows/release.yml

@@ -13,6 +13,8 @@ name: 🚀 Release (EAS build + submit)
 concurrency:
   group: release-${{ github.ref }}
   cancel-in-progress: false
+  # Queue successive releases in order instead of dropping the extra pending run.
+  queue: max
 
 on:
   push:
@@ -63,18 +65,26 @@ jobs:
             artifact_name: streamyfin-android-tv-apk
 
     steps:
-      - name: 📥 Checkout code
-        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
-        with:
-          fetch-depth: 0
-          submodules: recursive
-          show-progress: false
+      - parallel:
+          - name: 📥 Checkout code
+            uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+            with:
+              fetch-depth: 0
+              submodules: recursive
+              show-progress: false
 
-      - name: 🍞 Setup Bun
-        uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
-        with:
-          # renovate: datasource=npm depName=bun
-          bun-version: "1.3.14"
+          - name: 🍞 Setup Bun
+            uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2.2.0
+            with:
+              # renovate: datasource=npm depName=bun
+              bun-version: "1.3.14"
+
+          - name: 🏗️ Setup EAS
+            uses: expo/expo-github-action@eab7a230208c952974db8c3245cfd78402c7b385 # v9.0.0
+            with:
+              eas-version: latest
+              token: ${{ secrets.EXPO_TOKEN }}
+              eas-cache: true
 
       - name: 💾 Cache Bun dependencies
         uses: actions/cache@2c8a9bd7457de244a408f35966fab2fb45fda9c8 # v6.0.0
@@ -89,13 +99,6 @@ jobs:
           bun install --frozen-lockfile
           bun run submodule-reload
 
-      - name: 🏗️ Setup EAS
-        uses: expo/expo-github-action@eab7a230208c952974db8c3245cfd78402c7b385 # main
-        with:
-          eas-version: latest
-          token: ${{ secrets.EXPO_TOKEN }}
-          eas-cache: true
-
       # tvOS uses credentialsSource: local — restore the gitignored
       # credentials.json + cert + provisioning profiles from secrets.
       - name: 🔐 Restore tvOS signing credentials