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>

tests/test_issue_59_cli_interface.py

@@ -62,7 +62,31 @@ class TestIssuesListCommand:
             # Mock the plugin manager and backend
             mock_manager = Mock()
             mock_backend = Mock()
-            mock_issues = [Mock(spec=Issue), Mock(spec=Issue)]
+
+            # Create more realistic mock issues with proper attributes
+            from datetime import datetime
+            mock_datetime = Mock()
+            mock_datetime.strftime.return_value = "2023-01-01"
+
+            mock_issue1 = Mock(spec=Issue)
+            mock_issue1.number = 1
+            mock_issue1.title = "Test Issue 1"
+            mock_issue1.state = "open"
+            mock_issue1.labels = []
+            mock_issue1.body = "Test body 1"
+            mock_issue1.created_at = mock_datetime
+            mock_issue1.updated_at = mock_datetime
+
+            mock_issue2 = Mock(spec=Issue)
+            mock_issue2.number = 2
+            mock_issue2.title = "Test Issue 2"
+            mock_issue2.state = "closed"
+            mock_issue2.labels = []
+            mock_issue2.body = "Test body 2"
+            mock_issue2.created_at = mock_datetime
+            mock_issue2.updated_at = mock_datetime
+
+            mock_issues = [mock_issue1, mock_issue2]
 
             mock_manager_class.return_value = mock_manager
             mock_manager.get_backend.return_value = mock_backend
@@ -121,10 +145,18 @@ class TestIssuesListCommand:
         """Test that list command displays issues in readable table format."""
         mock_manager = Mock()
         mock_backend = Mock()
+        from datetime import datetime
+        mock_datetime = Mock()
+        mock_datetime.strftime.return_value = "2023-01-01"
+
         mock_issue = Mock()
         mock_issue.number = 59
         mock_issue.title = "Test Issue"
         mock_issue.state = "open"
+        mock_issue.labels = []
+        mock_issue.body = "Test issue body"
+        mock_issue.created_at = mock_datetime
+        mock_issue.updated_at = mock_datetime
 
         mock_manager_class.return_value = mock_manager
         mock_manager.get_backend.return_value = mock_backend
@@ -149,10 +181,26 @@ class TestIssuesShowCommand:
         """Test showing a specific issue by ID."""
         mock_manager = Mock()
         mock_backend = Mock()
+        from datetime import datetime
+        mock_datetime = Mock()
+        mock_datetime.strftime.return_value = "2023-01-01 00:00"
+
         mock_issue = Mock()
         mock_issue.number = 59
         mock_issue.title = "Test Issue"
-        mock_issue.body = "Test issue body"
+        mock_issue._body = "Test issue body"
+        mock_issue.state = Mock()
+        mock_issue.state.value = "open"
+        mock_issue.created_at = mock_datetime
+        mock_issue.updated_at = mock_datetime
+        mock_issue.labels = []
+        mock_issue.assignee = None
+        mock_issue.milestone = None
+        mock_issue.state_label = "OPEN"
+        mock_issue.priority_label = "Normal"
+        mock_issue.type_labels = []
+        mock_issue.other_labels = []
+        mock_issue.html_url = ""
 
         mock_manager_class.return_value = mock_manager
         mock_manager.get_backend.return_value = mock_backend
@@ -168,11 +216,27 @@ class TestIssuesShowCommand:
         """Test that show command displays comprehensive issue details."""
         mock_manager = Mock()
         mock_backend = Mock()
+        from datetime import datetime
+        mock_datetime = Mock()
+        mock_datetime.strftime.return_value = "2023-01-01 00:00"
+
         mock_issue = Mock()
         mock_issue.number = 59
         mock_issue.title = "Test Issue"
-        mock_issue.body = "Detailed issue description"
-        mock_issue.state = "open"
+        mock_issue._body = "Detailed issue description"
+        mock_issue.state = Mock()
+        mock_issue.state.value = "open"
+        mock_issue.created_at = mock_datetime
+        mock_issue.updated_at = mock_datetime
+        mock_issue.labels = []
+        mock_issue.assignee = None
+        mock_issue.milestone = None
+        mock_issue.state_label = "OPEN"
+        mock_issue.priority_label = "Normal"
+        mock_issue.type_labels = []
+        mock_issue.other_labels = []
+        mock_issue.html_url = ""
+        mock_issue.kanban_column = "To Do"
 
         mock_manager_class.return_value = mock_manager
         mock_manager.get_backend.return_value = mock_backend
@@ -189,9 +253,32 @@ class TestIssuesShowCommand:
         """Test showing issue with specific backend override."""
         mock_manager = Mock()
         mock_backend = Mock()
+
+        from datetime import datetime
+        mock_datetime = Mock()
+        mock_datetime.strftime.return_value = "2023-01-01 00:00"
+
+        mock_issue = Mock()
+        mock_issue.number = 59
+        mock_issue.title = "Test Issue"
+        mock_issue._body = "Test issue body"
+        mock_issue.state = Mock()
+        mock_issue.state.value = "open"
+        mock_issue.created_at = mock_datetime
+        mock_issue.updated_at = mock_datetime
+        mock_issue.labels = []
+        mock_issue.assignee = None
+        mock_issue.milestone = None
+        mock_issue.state_label = "OPEN"
+        mock_issue.priority_label = "Normal"
+        mock_issue.type_labels = []
+        mock_issue.other_labels = []
+        mock_issue.html_url = ""
+        mock_issue.kanban_column = "To Do"
+
         mock_manager_class.return_value = mock_manager
         mock_manager.get_backend.return_value = mock_backend
-        mock_backend.get_issue.return_value = Mock()
+        mock_backend.get_issue.return_value = mock_issue
 
         result = self.runner.invoke(cli, ['issues', 'show', '59', '--backend', 'gitea'])