updated to support sticky disk

.github/workflows/studio-e2e-test.yml

@@ -20,6 +20,12 @@ jobs:
 
     env:
       OPENAI_API_KEY: ${{ secrets.OPENAI_API_KEY }}
+      # Per-PR Turbopack cache key (falls back to per-branch on push)
+      TURBOPACK_CACHE_KEY: ${{ 
+        github.event_name == 'pull_request' &&
+          format('{0}-pr-{1}-turbopack-cache', github.repository, github.event.pull_request.number) ||
+          format('{0}-branch-{1}-turbopack-cache', github.repository, github.ref_name)
+      }}
 
     steps:
       - uses: actions/checkout@08eba0b27e820071cde6df949e0beb9ba4906955 # v4.3.0
@@ -36,6 +42,16 @@ jobs:
               - 'e2e/studio/**'
               - 'pnpm-lock.yaml'
               - '.github/workflows/studio-e2e-test.yml'
+
+      # ⬇️ Mount Turbopack cache on a Sticky Disk (per PR)
+      - name: Mount Turbopack cache (Sticky Disk)
+        if: steps.filter.outputs.studio == 'true'
+        uses: useblacksmith/stickydisk@v1
+        with:
+          key: ${{ env.TURBOPACK_CACHE_KEY }}
+          # adjust if your Next app lives elsewhere
+          path: apps/studio/.next/cache
+
       - uses: pnpm/action-setup@41ff72655975bd51cab0327fa583b6e92b6d3061 # v4.2.0
         if: steps.filter.outputs.studio == 'true'
         name: Install pnpm