fix(ci): use GITHUB_TOKEN for semantic-release and harden workflow permissions

Replace secrets.PAT with secrets.GITHUB_TOKEN in publish.yml so
semantic-release can comment on PRs/issues using the built-in token
scoped by job-level permissions.

Set top-level permissions to empty object across all workflows to
follow the principle of least privilege, relying on job-level
permissions blocks instead.

.github/workflows/codeql.yml

@@ -21,6 +21,8 @@ on:
   schedule:
     - cron: "22 8 * * 0"
 
+permissions: {}
+
 jobs:
   analyze:
     name: Analyze (${{ matrix.language }})