debug: enable show_full_output for code review workflow

Temporarily enable full output to diagnose why review comments
are not being posted despite successful execution.

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

Author: senna-lang

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

@@ -40,6 +40,7 @@ jobs:
           plugins: 'code-review@claude-code-plugins'
           prompt: '/code-review:code-review ${{ github.repository }}/pull/${{ github.event.pull_request.number }}'
           allowed_bots: 'claude'
+          show_full_output: true
           # See https://github.com/anthropics/claude-code-action/blob/main/docs/usage.md
           # or https://code.claude.com/docs/en/cli-reference for available options