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/a76/classes/dto.py

@@ -2,6 +2,7 @@
 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
@@ -9,17 +10,38 @@ from datetime import datetime
 
 class ClassCreateDTO(BaseModel):
     """DTO para crear una clase"""
+
     client_id: int = Field(..., description="Client key")
     class_code: str = Field(..., max_length=8, description="Class code")
-    description_spanish: Optional[str] = Field(None, max_length=500, description="Description in Spanish")
-    description_english: Optional[str] = Field(None, max_length=500, description="Description in English")
-    material_key: Optional[str] = Field(None, max_length=10, description="Material key (homologated TIPOMAT/TIPOMATEQUIPO)")
-    unit_of_measure: Optional[str] = Field(None, max_length=5, description="Unit of measure (homologated UNIMEDIDA)")
-    fraction: Optional[str] = Field(None, max_length=10, description="Mexican tariff fraction")
-    us_fraction: Optional[str] = Field(None, max_length=16, description="US tariff fraction")
-    sub_key: Optional[str] = Field(None, max_length=5, description="Sub classification key")
-    physical_review: Optional[int] = Field(None, description="Physical review indicator")
-    iva_exempt_fraction: Optional[str] = Field(None, max_length=4, description="IVA exempt fraction")
+    description_spanish: Optional[str] = Field(
+        None, max_length=500, description="Description in Spanish"
+    )
+    description_english: Optional[str] = Field(
+        None, max_length=500, description="Description in English"
+    )
+    material_key: Optional[str] = Field(
+        None,
+        max_length=10,
+        description="Material key (homologated TIPOMAT/TIPOMATEQUIPO)",
+    )
+    unit_of_measure: Optional[str] = Field(
+        None, max_length=5, description="Unit of measure (homologated UNIMEDIDA)"
+    )
+    fraction: Optional[str] = Field(
+        None, max_length=10, description="Mexican tariff fraction"
+    )
+    us_fraction: Optional[str] = Field(
+        None, max_length=16, description="US tariff fraction"
+    )
+    sub_key: Optional[str] = Field(
+        None, max_length=5, description="Sub classification key"
+    )
+    physical_review: Optional[int] = Field(
+        None, description="Physical review indicator"
+    )
+    iva_exempt_fraction: Optional[str] = Field(
+        None, max_length=4, description="IVA exempt fraction"
+    )
 
     class Config:
         from_attributes = True
@@ -27,15 +49,36 @@ class ClassCreateDTO(BaseModel):
 
 class ClassUpdateDTO(BaseModel):
     """DTO para actualizar una clase"""
-    description_spanish: Optional[str] = Field(None, max_length=500, description="Description in Spanish")
-    description_english: Optional[str] = Field(None, max_length=500, description="Description in English")
-    material_key: Optional[str] = Field(None, max_length=10, description="Material key (homologated TIPOMAT/TIPOMATEQUIPO)")
-    unit_of_measure: Optional[str] = Field(None, max_length=5, description="Unit of measure (homologated UNIMEDIDA)")
-    fraction: Optional[str] = Field(None, max_length=10, description="Mexican tariff fraction")
-    us_fraction: Optional[str] = Field(None, max_length=16, description="US tariff fraction")
-    sub_key: Optional[str] = Field(None, max_length=5, description="Sub classification key")
-    physical_review: Optional[int] = Field(None, description="Physical review indicator")
-    iva_exempt_fraction: Optional[str] = Field(None, max_length=4, description="IVA exempt fraction")
+
+    description_spanish: Optional[str] = Field(
+        None, max_length=500, description="Description in Spanish"
+    )
+    description_english: Optional[str] = Field(
+        None, max_length=500, description="Description in English"
+    )
+    material_key: Optional[str] = Field(
+        None,
+        max_length=10,
+        description="Material key (homologated TIPOMAT/TIPOMATEQUIPO)",
+    )
+    unit_of_measure: Optional[str] = Field(
+        None, max_length=5, description="Unit of measure (homologated UNIMEDIDA)"
+    )
+    fraction: Optional[str] = Field(
+        None, max_length=10, description="Mexican tariff fraction"
+    )
+    us_fraction: Optional[str] = Field(
+        None, max_length=16, description="US tariff fraction"
+    )
+    sub_key: Optional[str] = Field(
+        None, max_length=5, description="Sub classification key"
+    )
+    physical_review: Optional[int] = Field(
+        None, description="Physical review indicator"
+    )
+    iva_exempt_fraction: Optional[str] = Field(
+        None, max_length=4, description="IVA exempt fraction"
+    )
 
     class Config:
         from_attributes = True
@@ -43,6 +86,7 @@ class ClassUpdateDTO(BaseModel):
 
 class ClassResponseDTO(BaseModel):
     """DTO para respuesta de clase"""
+
     client_id: int
     class_code: str
     description_spanish: Optional[str] = None
@@ -61,6 +105,7 @@ class ClassResponseDTO(BaseModel):
 
 class ClassBasicDTO(BaseModel):
     """DTO para información básica de clase"""
+
     client_id: int
     class_code: str
     description_spanish: Optional[str] = None
@@ -74,6 +119,7 @@ class ClassBasicDTO(BaseModel):
 
 class ClassListDTO(BaseModel):
     """DTO para lista de clases"""
+
     classes: list[ClassBasicDTO]
     total: int
     page: int
@@ -85,13 +131,15 @@ class ClassListDTO(BaseModel):
 
 class ClassSearchDTO(BaseModel):
     """DTO para búsqueda de clases"""
+
     client_id: Optional[int] = Field(None, description="Filter by client key")
     class_code: Optional[str] = Field(None, description="Search by class code")
     description: Optional[str] = Field(None, description="Search in descriptions")
     material_key: Optional[str] = Field(None, description="Filter by material key")
     fraction: Optional[str] = Field(None, description="Filter by tariff fraction")
-    physical_review: Optional[int] = Field(None, description="Filter by physical review indicator")
+    physical_review: Optional[int] = Field(
+        None, description="Filter by physical review indicator"
+    )
 
     class Config:
         from_attributes = True
-