feat: Implement multi-tenancy support in middleware and security layers

- Enhanced TenantMiddleware to validate tenant information from JWT tokens.
- Added LicenseValidationMiddleware to check tenant licenses before processing requests.
- Updated security utilities to extract tenant information from tokens and validate company access.
- Introduced CompanyStore to manage active company state and handle company switching in the frontend.
- Modified API routes to include company_id in requests for better resource management.
- Improved logging and error handling throughout the middleware and API layers.
- Updated frontend components to reflect changes in company management and selection.
- Added new API route for fetching user's companies with proper authentication handling.

backend/alembic/env.py

@@ -13,6 +13,7 @@ logger = logging.getLogger(__name__)
 # access to the values within the .ini file in use.
 config = context.config
 
+
 def get_database_url():
     """Obtiene la URL de la base de datos (PostgreSQL) desde variables de entorno o alembic.ini."""
     # Intentar construir desde variables de entorno primero
@@ -41,6 +42,7 @@ def get_database_url():
 
     return url
 
+
 # Configurar la URL de la base de datos
 database_url = get_database_url()
 
@@ -54,7 +56,7 @@ if os.environ.get("ALEMBIC_DEBUG"):
         debug_url = before + "@" + after
     except Exception:
         debug_url = "postgresql://***:***@***"
-        logger.error("Error al ocultar la contraseña en la URL para debug.")    
+        logger.error("Error al ocultar la contraseña en la URL para debug.")
 
 config.set_main_option("sqlalchemy.url", database_url)
 
@@ -77,8 +79,9 @@ config = context.config
 fileConfig(config.config_file_name)
 target_metadata = Base.metadata
 
+
 def import_models_from_dir(dir_path: str):
-    """Importa recursivamente cualquier archivo models.py desde dir_path y archivos en directorios models/"""    
+    """Importa recursivamente cualquier archivo models.py desde dir_path y archivos en directorios models/"""
     for root, dirs, files in os.walk(dir_path):
         # Importar archivos models.py directos
         if "models.py" in files:
@@ -90,7 +93,7 @@ def import_models_from_dir(dir_path: str):
             spec = importlib.util.spec_from_file_location(module_name, module_path)
             mod = importlib.util.module_from_spec(spec)
             spec.loader.exec_module(mod)
-        
+
         # Importar todos los archivos .py en directorios llamados "models"
         if os.path.basename(root) == "models":
             for file in files:
@@ -99,18 +102,20 @@ def import_models_from_dir(dir_path: str):
                     rel_path = os.path.relpath(module_path, BASE_DIR)
                     module_name = rel_path.replace(os.sep, ".").replace(".py", "")
                     try:
-                        spec = importlib.util.spec_from_file_location(module_name, module_path)
+                        spec = importlib.util.spec_from_file_location(
+                            module_name, module_path
+                        )
                         mod = importlib.util.module_from_spec(spec)
                         spec.loader.exec_module(mod)
                     except Exception as e:
                         logger.warning(f"No se pudo importar {module_path}: {e}")
 
+
 # Importar todos los models dentro de api/v1/modules y api/v1/modules/uploads
 modules_dir = os.path.join(BASE_DIR, "api", "v1", "modules")
 import_models_from_dir(modules_dir)
 
 
-
 def run_migrations_offline() -> None:
     """Run migrations in 'offline' mode.
 
@@ -147,10 +152,7 @@ def run_migrations_online() -> None:
     )
 
     with connectable.connect() as connection:
-        context.configure(
-            connection=connection, 
-            target_metadata=target_metadata
-        )
+        context.configure(connection=connection, target_metadata=target_metadata)
 
         with context.begin_transaction():
             context.run_migrations()
@@ -159,4 +161,4 @@ def run_migrations_online() -> None:
 if context.is_offline_mode():
     run_migrations_offline()
 else:
-    run_migrations_online()
+    run_migrations_online()