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/api/v1/modules/a24/s/s_classes/models.py

@@ -1,21 +1,34 @@
-from sqlalchemy import ForeignKeyConstraint, Integer, PrimaryKeyConstraint, String, UniqueConstraint
+from sqlalchemy import (
+    ForeignKeyConstraint,
+    Integer,
+    PrimaryKeyConstraint,
+    String,
+    UniqueConstraint,
+)
 from sqlalchemy.orm import Mapped, mapped_column
 from sqlalchemy.orm.base import Mapped
 from core.database import Base
 
+
 class SClasses(Base):
-    __tablename__ = 's_classes' #SClases
-    __table_args__ = (        
-        ForeignKeyConstraint(['tenant_id'], ['a76.tenants.id'], name='fk_sclasses_tenants'),
-        ForeignKeyConstraint(['company_id'], ['a76.company.id'], name='fk_sclasses_company'),
-        ForeignKeyConstraint(['class_id'], ['a76.clases.class_id'], name='fk_sclasses_classes'),
-        PrimaryKeyConstraint('id', name='sclases_pk'),
-        {'schema': 'a24'}
+    __tablename__ = "s_classes"  # SClases
+    __table_args__ = (
+        ForeignKeyConstraint(
+            ["tenant_id"], ["a76.tenants.id"], name="fk_sclasses_tenants"
+        ),
+        ForeignKeyConstraint(
+            ["company_id"], ["a76.company.id"], name="fk_sclasses_company"
+        ),
+        ForeignKeyConstraint(
+            ["class_id"], ["a76.clases.class_id"], name="fk_sclasses_classes"
+        ),
+        PrimaryKeyConstraint("id", name="sclases_pk"),
+        {"schema": "a24"},
     )
     id: Mapped[int] = mapped_column(Integer, primary_key=True)
-    class_id: Mapped[int] = mapped_column(Integer, nullable=False) #Id de clase   
+    class_id: Mapped[int] = mapped_column(Integer, nullable=False)  # Id de clase
     tenant_id: Mapped[int] = mapped_column(Integer, nullable=False, index=True)
     company_id: Mapped[int] = mapped_column(Integer, nullable=True, index=True)
-     
-    stock_um: Mapped[str]  = mapped_column(String(5)) #Unidad de medida para existencia  
-    us_tariff_code: Mapped[str]  = mapped_column(String(19)) #Fracción americana (USA)
+
+    stock_um: Mapped[str] = mapped_column(String(5))  # Unidad de medida para existencia
+    us_tariff_code: Mapped[str] = mapped_column(String(19))  # Fracción americana (USA)