Update ContentService refactoring design document to reflect Phase 8 facade finalization completion. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
Update ContentService refactoring design document to reflect Phase 8 facade finalization completion. 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>