ci: parallelize github workflows

.github/workflows/e2e.yml

@@ -67,6 +67,17 @@ jobs:
       - name: Enable corepack (pnpm)
         run: corepack enable
 
+      - name: Resolve pnpm store path
+        id: pnpm-store
+        run: echo "path=$(pnpm store path --silent)" >> "$GITHUB_OUTPUT"
+
+      - uses: actions/cache@v4
+        with:
+          path: ${{ steps.pnpm-store.outputs.path }}
+          key: ${{ runner.os }}-node-24-pnpm-${{ hashFiles('pnpm-lock.yaml') }}
+          restore-keys: |
+            ${{ runner.os }}-node-24-pnpm-
+
       - name: Install (immutable)
         run: pnpm install --frozen-lockfile