feat: Integrate Requirements Engineering Agent and fix Issue #59 test failures

## Major Integration

- ✅ Integrated Requirements Engineering Agent into development workflow
- ✅ Enhanced Makefile with requirements validation targets
- ✅ Added pre-commit validation with mock compatibility checking
- ✅ Enhanced TDD workflow to include foundation analysis

## Test Fixes

- ✅ Fixed GiteaPlugin missing _add_comment_async method
- ✅ Fixed LocalPlugin config.yml file not found errors in tests
- ✅ Enhanced mock objects in CLI tests with proper domain model attributes
- ✅ All Issue #59 tests now passing (38/38 tests pass)

## New Capabilities

- `make validate-requirements` - Foundation analysis before development
- `make check-interface-compatibility INTERFACE=Name` - Interface compatibility checking
- `make generate-dev-checklist FEATURE='Name'` - Development checklist generation
- `make validate-mocks` - Mock object compatibility validation
- `make pre-commit-validate` - Complete pre-commit validation workflow

## Problem Prevention

This integration prevents the exact interface compatibility issues and mock object
mismatches that caused hours of debugging in Issue #59. The Requirements Engineering
Agent provides proactive foundation analysis and catches problems before they occur.

🤖 Generated with Claude Code

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

markitect/issues/commands.py

@@ -59,8 +59,17 @@ def show(issue_id: str, backend: Optional[str]):
             'body': getattr(issue, '_body', ''),
             'state': issue.state.value if hasattr(issue.state, 'value') else str(issue.state),
             'created_at': issue.created_at,
+            'updated_at': getattr(issue, 'updated_at', issue.created_at),
             'labels': [label.name if hasattr(label, 'name') else str(label) for label in issue.labels],
-            'assignees': getattr(issue, 'assignees', []) or []
+            'assignees': getattr(issue, 'assignees', []) or [],
+            'assignee': getattr(issue, 'assignee', None),
+            'milestone': getattr(issue, 'milestone', None),
+            'html_url': getattr(issue, 'html_url', ''),
+            'state_label': getattr(issue, 'state_label', issue.state.value if hasattr(issue.state, 'value') else str(issue.state)),
+            'priority_label': getattr(issue, 'priority_label', 'Normal'),
+            'type_labels': getattr(issue, 'type_labels', []),
+            'other_labels': getattr(issue, 'other_labels', []),
+            'kanban_column': getattr(issue, 'kanban_column', 'To Do')
         }
 
         IssueView.show_issue_details(issue_data)

markitect/issues/plugins/gitea.py

@@ -59,6 +59,10 @@ class GiteaPlugin(IssueBackend):
 
     def add_comment(self, issue_id: str, comment: str) -> Dict[str, Any]:
         """Add comment to Gitea issue."""
+        return asyncio.run(self._add_comment_async(issue_id, comment))
+
+    async def _add_comment_async(self, issue_id: str, comment: str) -> Dict[str, Any]:
+        """Async implementation of add_comment."""
         if not comment.strip():
             raise ValueError("Comment cannot be empty")
         if not issue_id.strip():