fix: CI report needs checkout + routing needs user-level skill install

Two fixes:
1. Report job: add actions/checkout so `gh pr comment` has git context.
   Also add pull-requests:write permission for comment posting.
2. Routing tests: install skills to BOTH project-level (.claude/skills/)
   AND user-level (~/.claude/skills/) since Claude Code discovers from
   both locations. In CI containers, $HOME differs from workdir.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

.github/workflows/evals.yml

@@ -130,7 +130,14 @@ jobs:
     needs: evals
     if: always() && github.event_name == 'pull_request'
     timeout-minutes: 5
+    permissions:
+      contents: read
+      pull-requests: write
     steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 1
+
       - name: Download all eval artifacts
         uses: actions/download-artifact@v4
         with: