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/check-lockfile.yml

@@ -18,19 +18,20 @@ jobs:
       contents: read
 
     steps:
-      - name: 📥 Checkout repository
-        uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
-        with:
-          ref: ${{ github.event.pull_request.head.sha || github.sha }}
-          show-progress: false
-          submodules: recursive
-          fetch-depth: 0
+      - parallel:
+          - name: 📥 Checkout repository
+            uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0 # v7.0.0
+            with:
+              ref: ${{ github.event.pull_request.head.sha || github.sha }}
+              show-progress: false
+              submodules: recursive
+              fetch-depth: 0
 
-      - 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: 💾 Cache Bun dependencies
         uses: actions/cache@2c8a9bd7457de244a408f35966fab2fb45fda9c8 # v6.0.0