Refactor backend and frontend code for improved structure and functionality

- Rearranged imports in multiple files for consistency and clarity.
- Updated logging middleware to exclude specific paths from logging.
- Enhanced security module by cleaning up token handling and improving tenant validation.
- Added tenant and company scoped mixins for better database model management.
- Implemented generic CRUD routes for tenant-scoped resources.
- Improved error handling and response management in API routes.
- Cleaned up login and logout processes to ensure proper session management.
- Introduced mechanisms to clear local storage and cookies on tenant change.
- Enhanced company store to detect tenant changes and clear data accordingly.
- Added new DTO mixins for currency and value affect flags.

backend/api/v1/modules/a76/classes/dto.py

@@ -3,9 +3,9 @@ DTOs (Data Transfer Objects) para módulo de clases SCAII y SCAF
 Reemplaza schemas.py siguiendo enfoque DDD y estilo NestJS
 """
 
-from pydantic import BaseModel, Field
 from typing import Optional
-from datetime import datetime
+
+from pydantic import BaseModel, Field
 
 
 class ClassCreateDTO(BaseModel):