feat(native-renderer): harden hybrid auto backend proof

.github/workflows/ci.yml

@@ -146,6 +146,33 @@ jobs:
       - run: bun install --frozen-lockfile
       - run: bun run --filter @hyperframes/core test:hyperframe-runtime-ci
 
+  native-renderer:
+    name: "Test: native renderer"
+    needs: changes
+    if: needs.changes.outputs.code == 'true'
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          lfs: true
+      - uses: oven-sh/setup-bun@v2
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 22
+      - uses: dtolnay/rust-toolchain@stable
+      - name: Install FFmpeg
+        run: sudo apt-get update && sudo apt-get install -y ffmpeg
+      - run: bun install --frozen-lockfile
+      - run: cargo test --manifest-path packages/native-renderer/Cargo.toml -- --test-threads=1
+      - run: bun test packages/cli/src/utils/nativeBackend.test.ts packages/native-renderer/src/scene/extract.test.ts packages/native-renderer/src/scene/support.test.ts packages/native-renderer/src/timeline/bake.test.ts
+      - name: Native renderer comparison shard
+        run: |
+          bun packages/native-renderer/scripts/compare-regression-fixtures.ts \
+            --fixtures gsap-letters-render-compat \
+            --max-duration 0.25 \
+            --artifacts /tmp/native-renderer-comparison-ci
+
   smoke-global-install:
     name: "Smoke: global install"
     needs: [changes, build]