## Code Review - Round 2
### Previous Issues Addressed
All issues from previous review have been fixed:
| Issue | Status | Fix |
|-------|--------|-----|
| Missing `withdrawn` in status validation test | ✅ Fixed | Line 19 now includes "withdrawn" |
| Missing `withdrawn?` predicate test | ✅ Fixed | Lines 128-138 test `withdrawn?` |
| Missing `scope :withdrawn` | ✅ Fixed | Added to model at line 18 |
| Missing `.withdrawn` scope test | ✅ Fixed | Lines 68-76 test the scope |
### Test Results
- Test suite: `bundle exec rspec`
- Results: 700 examples, 2 failures, 7 pending
**Note:** The 2 failing tests are pre-existing dashboard_spec.rb issues unrelated to this PR.
### Spec Coverage Check
- All model changes covered by `spec/models/proposal_spec.rb` (35 examples, 0 failures)
- All MCP tool changes covered by `spec/requests/api/v1/mcp_spec.rb` (18 execute_proposal tests)
### Decision
**PASS** - All previous issues resolved.
The PR now has complete spec coverage for:
- `withdrawn` status in validation
- `withdrawn?` predicate
- `scope :withdrawn`
- Full execute_proposal MCP functionality