Add explicit permissions to CI workflow for security

Co-authored-by: kalwalt <[email protected]>

Author: Copilot

.github/workflows/ci-format-lint.yml

@@ -8,6 +8,8 @@ on:
 jobs:
   format-lint:
     runs-on: ubuntu-latest
+    permissions:
+      contents: read
     steps:
       - name: Checkout
         uses: actions/checkout@v4