ci: grant write perms to disabled Claude Code Review workflow

The auto-review on PR #637 ran for 7m13s and exited successfully, but
no review comment was posted. Job log on the prior run #640 showed
"No buffered inline comments", suggesting the action's post path
silently no-op'd. Workflow GITHUB_TOKEN had only read on pull-requests
and issues, so any fallback gh post would also have failed.

Grant pull-requests: write and issues: write so a future re-enable
posts comments correctly. The workflow stays in .disable state.

https://claude.ai/code/session_01UCYhQp5BYJRzWEbxCanHrZ

Author: claude

.github/workflows/claude-code-review.yml.disable

@@ -21,8 +21,8 @@ jobs:
     runs-on: ubuntu-latest
     permissions:
       contents: read
-      pull-requests: read
-      issues: read
+      pull-requests: write
+      issues: write
       id-token: write
 
     steps: