fix(perf): Use GH API instead of full repo clone

Signed-off-by: Marcel Müller <marcel-mueller@gmx.de>

Author: SystemKeeper

workflow-templates/ai-policy.yml

@@ -27,23 +27,15 @@ concurrency:
 
 jobs:
   check-ai-trailers:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-latest-low
     steps:
-      - name: Checkout
-        uses: actions/checkout@df4cb1c069e1874edd31b4311f1884172cec0e10 # v6.0.3
-        with:
-          fetch-depth: 0
-          persist-credentials: false
-
       - name: Collect PR commit messages
         id: collect
         env:
-          BASE_REF: ${{ github.base_ref }}
+          GH_TOKEN: ${{ github.token }}
         run: |
           set -euo pipefail
-          git fetch origin "${BASE_REF}"
-          MERGE_BASE=$(git merge-base "origin/${BASE_REF}" HEAD)
-          git log --format="%B" "${MERGE_BASE}..HEAD" > /tmp/pr_commits.txt
+          gh api ${{ github.event.pull_request.commits_url }} | jq -r '.[] | .commit.message' > /tmp/pr_commits.txt
           echo "--- PR commit messages ---"
           cat /tmp/pr_commits.txt
           echo "--------------------------"