ci: cut wasted minutes from measurement_id and WASM jobs

.github/workflows/ci.yml

@@ -146,7 +146,11 @@ jobs:
     timeout-minutes: 10
     steps:
       - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7
+      # sync: false — the test runs via `uv run --no-project` and needs no workspace
+      # packages; the default `uv sync` builds the vortex-data Rust extension (~6 min).
       - uses: spiraldb/actions/.github/actions/setup-uv@a746510eafaa926484c354541cfc49b2ec06cc63  # 0.18.6
+        with:
+          sync: false
       - name: Pytest - measurement_id golden vectors
         run: |
           uv run --no-project --with pytest --with xxhash \
@@ -415,6 +419,10 @@ jobs:
             --exclude compress-bench --exclude xtask --exclude vortex-datafusion `
             --exclude gpu-scan-cli --exclude vortex-sqllogictest
 
+      - name: sccache stats
+        if: always() && github.repository == 'vortex-data/vortex'
+        run: sccache --show-stats
+
       - name: Alert incident.io
         if: failure() && github.event_name == 'push' && github.ref == 'refs/heads/develop'
         uses: ./.github/actions/alert-incident-io
@@ -584,14 +592,23 @@ jobs:
 
   wasm-integration:
     name: "WASM integration smoke test"
-    runs-on: ubuntu-latest
     timeout-minutes: 30
+    runs-on: >-
+      ${{ github.repository == 'vortex-data/vortex'
+          && format('runs-on={0}/runner=amd64-medium/image=ubuntu24-full-x64-pre-v2/extras=s3-cache/tag=wasm-integration', github.run_id)
+          || 'ubuntu-latest' }}
     steps:
+      - uses: runs-on/action@v2
+        if: github.repository == 'vortex-data/vortex'
+        with:
+          sccache: s3
       - uses: actions/checkout@9c091bb21b7c1c1d1991bb908d89e4e9dddfe3e0  # v7
-      - uses: ./.github/actions/setup-rust
+      - uses: ./.github/actions/setup-prebuild
         with:
-          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          enable-sccache: "true"
           targets: "wasm32-wasip1"
+      - name: Install wasm32-wasip1 target
+        run: rustup target add wasm32-wasip1
       - name: Setup Wasmer
         shell: bash
         run: |