test: shard Chromium E2E across twenty-four jobs

.github/workflows/ci-tests-e2e.yaml

@@ -73,8 +73,34 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        shardIndex: [1, 2, 3, 4, 5, 6, 7, 8]
-        shardTotal: [8]
+        shardIndex:
+          [
+            1,
+            2,
+            3,
+            4,
+            5,
+            6,
+            7,
+            8,
+            9,
+            10,
+            11,
+            12,
+            13,
+            14,
+            15,
+            16,
+            17,
+            18,
+            19,
+            20,
+            21,
+            22,
+            23,
+            24
+          ]
+        shardTotal: [24]
     steps:
       - name: Checkout repository
         uses: actions/checkout@v6
@@ -93,7 +119,7 @@ jobs:
       # Run sharded tests (browsers pre-installed in container)
       - name: Run Playwright tests (Shard ${{ matrix.shardIndex }}/${{ matrix.shardTotal }})
         id: playwright
-        run: pnpm exec playwright test --project=chromium --shard=${{ matrix.shardIndex }}/${{ matrix.shardTotal }} --reporter=blob
+        run: pnpm exec playwright test --project=chromium --shard=${{ matrix.shardIndex }}/${{ matrix.shardTotal }} --workers=2 --reporter=blob
         env:
           PLAYWRIGHT_BLOB_OUTPUT_DIR: ./blob-report
           COLLECT_COVERAGE: 'true'