Fix Claude Code GitHub Action authentication error

Update workflow permissions to grant write access for pull-requests and issues.
The action needs write permissions to post review comments via gh pr comment.

Changes:
- pull-requests: read → write
- issues: read → write

This resolves the "User does not have write access on this repository" error
that was preventing the Claude Code review from running on PRs.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: devondragon

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

@@ -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: