feat: implement CI/CD pipeline with Gitea Actions

- Add Gitea Actions workflow with 4 stages: lint, test, build, push
- Configure ruff linting and formatting checks
- Set up Django tests with PostgreSQL and Redis services
- Implement Docker image building for web and celery services
- Add requirements.txt and requirements-dev.txt generation
- Fix ipdb compatibility issues in test runner
- Update ruff configuration for Django compatibility
- Add comprehensive CI/CD documentation

src/config/settings/development.py

@@ -41,6 +41,6 @@ CACHES = {
         "LOCATION": "redis://127.0.0.1:6379/1",
         "OPTIONS": {
             "CLIENT_CLASS": "django_redis.client.DefaultClient",
-        }
+        },
     }
 }