fix(ci): replace broad permissions with specific scopes in workflows

Replace read-all/write-all with minimum required permission scopes
across all GitHub Actions workflows to follow the principle of least
privilege (SonarCloud rule githubactions:S8234).

.github/workflows/changelog.yml

@@ -9,13 +9,15 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.ref }}
   cancel-in-progress: true
 
-permissions: read-all
+permissions:
+  contents: read
 
 jobs:
   debug-changelog:
     runs-on: ubuntu-latest
 
-    permissions: write-all
+    permissions:
+      contents: read
 
     steps:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2