fix(ci): harden workflow permissions and use GITHUB_TOKEN for releases (#109)

Replace overly broad top-level permissions (read-all) with empty
defaults and declare minimal job-level permissions. Switch publish
workflow from secrets.PAT to secrets.GITHUB_TOKEN so semantic-release
can comment on PRs and issues.

.github/workflows/publish.yml

@@ -6,7 +6,7 @@ on:
     branches:
       - main
 
-permissions: read-all
+permissions: {}
 
 env:
   NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
@@ -20,8 +20,6 @@ jobs:
       statuses: write
       contents: read
       packages: read
-      issues: write
-      pull-requests: write
 
     steps:
       - name: Run PR Lint
@@ -72,5 +70,5 @@ jobs:
       - name: Semantic Release
         uses: cycjimmy/semantic-release-action@b12c8f6015dc215fe37bc154d4ad456dd3833c90 # v6.0.0
         env:
-          GITHUB_TOKEN: ${{ secrets.PAT }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
           NPM_TOKEN: ${{ secrets.NPM_TOKEN }}