feat: complete dev_tools module self-containment

Migrate dev_tools module to self-contained structure:

- routes/api/ - API endpoints
- models/architecture_scan.py - Architecture scan models
- models/test_run.py - Test run models
- schemas/ - Pydantic schemas
- services/ - Business logic services
- tasks/ - Celery background tasks
- exceptions.py - Module exceptions

Updated definition.py with self-contained paths.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

app/modules/dev_tools/__init__.py

@@ -2,20 +2,45 @@
 """
 Dev-Tools Module - Developer tools and utilities.
 
-This module provides:
+This is a self-contained internal module providing:
+- Code quality scanning (architecture, security, performance validators)
+- Violation tracking and assignment
+- Test execution and results management
 - Component library browser
 - Icon browser
-- Development utilities
+
+Module Structure:
+- models/ - Database models (ArchitectureScan, TestRun, etc.)
+- services/ - Business logic (CodeQualityService, TestRunnerService)
+- schemas/ - Pydantic DTOs
+- tasks/ - Celery background tasks
+- routes/ - API and page routes
+- exceptions.py - Module-specific exceptions
 
 Routes:
-- Admin: (page routes only, minimal API)
-- Vendor: None
+- Admin: Code quality API, test runner API, component/icon pages
+- Vendor: None (internal module)
 
 Menu Items:
-- Admin: components, icons
+- Admin: components, icons, code-quality, tests
 - Vendor: None
 """
 
-from app.modules.dev_tools.definition import dev_tools_module
+# Use lazy imports to avoid circular import issues when models are loaded early
+# The definition imports from app.modules.base which eventually imports models
 
-__all__ = ["dev_tools_module"]
+
+def __getattr__(name: str):
+    """Lazy import module components to avoid circular imports."""
+    if name == "dev_tools_module":
+        from app.modules.dev_tools.definition import dev_tools_module
+
+        return dev_tools_module
+    elif name == "get_dev_tools_module_with_routers":
+        from app.modules.dev_tools.definition import get_dev_tools_module_with_routers
+
+        return get_dev_tools_module_with_routers
+    raise AttributeError(f"module {__name__!r} has no attribute {name!r}")
+
+
+__all__ = ["dev_tools_module", "get_dev_tools_module_with_routers"]