fix(ci): install libatomic1 for pyright on ARC runner

The hanzo-build ARC runner image is missing libatomic.so.1 which
pyright-python's bundled Node.js requires. Install it before linting.

.github/workflows/ci.yml

@@ -16,6 +16,11 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - name: Install system dependencies
+        run: |
+          sudo apt-get update -qq
+          sudo apt-get install -y -qq libatomic1 2>/dev/null || true
+
       - name: Install Rye
         run: |
           curl -sSf https://rye.astral.sh/get | bash