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/services/__init__.py

@@ -0,0 +1,42 @@
+# app/modules/dev_tools/services/__init__.py
+"""
+Dev-Tools module services.
+
+This module re-exports services from their current locations.
+In future cleanup phases, the actual service implementations
+may be moved here.
+
+Services:
+- code_quality_service: Code quality scanning and violation management
+- test_runner_service: Test execution and results management
+"""
+
+from app.services.code_quality_service import (
+    code_quality_service,
+    CodeQualityService,
+    VALIDATOR_ARCHITECTURE,
+    VALIDATOR_SECURITY,
+    VALIDATOR_PERFORMANCE,
+    VALID_VALIDATOR_TYPES,
+    VALIDATOR_SCRIPTS,
+    VALIDATOR_NAMES,
+)
+from app.services.test_runner_service import (
+    test_runner_service,
+    TestRunnerService,
+)
+
+__all__ = [
+    # Code quality
+    "code_quality_service",
+    "CodeQualityService",
+    "VALIDATOR_ARCHITECTURE",
+    "VALIDATOR_SECURITY",
+    "VALIDATOR_PERFORMANCE",
+    "VALID_VALIDATOR_TYPES",
+    "VALIDATOR_SCRIPTS",
+    "VALIDATOR_NAMES",
+    # Test runner
+    "test_runner_service",
+    "TestRunnerService",
+]