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/fraction_rule_octave/dto.py

@@ -5,6 +5,7 @@ DTOs for FractionRuleOctave.
 from pydantic import BaseModel
 from typing import Optional
 
+
 class FractionRuleOctaveBaseDTO(BaseModel):
     PERMISSION: str
     LINE: int
@@ -16,9 +17,11 @@ class FractionRuleOctaveBaseDTO(BaseModel):
     UNIT_COST_ME: Optional[float]
     UNIT_MEASURE: Optional[str]
 
+
 class FractionRuleOctaveCreateDTO(FractionRuleOctaveBaseDTO):
     pass
 
+
 class FractionRuleOctaveResponseDTO(FractionRuleOctaveBaseDTO):
     class Config:
-        from_attributes = True
+        from_attributes = True

backend/api/v1/modules/a76/fraction_rule_octave/models.py

@@ -1,4 +1,11 @@
-from sqlalchemy import Integer, String, ForeignKey, PrimaryKeyConstraint, ForeignKeyConstraint, UniqueConstraint
+from sqlalchemy import (
+    Integer,
+    String,
+    ForeignKey,
+    PrimaryKeyConstraint,
+    ForeignKeyConstraint,
+    UniqueConstraint,
+)
 from sqlalchemy.orm import Mapped, mapped_column
 from core.database import Base
 
@@ -6,18 +13,28 @@ from core.database import Base
 class FractionRuleOctave(Base):
     __tablename__ = "fraction_rule_octave"
     __table_args__ = (
-        PrimaryKeyConstraint('id', name='fraction_rule_octave_pkey'),
-        ForeignKeyConstraint(['tenant_id'], ['a76.tenants.id'], name='fk_fraction_rule_octave_tenant'),
-        ForeignKeyConstraint(['company_id'], ['a76.company.id'], name='fk_fraction_rule_octave_company'),
-        UniqueConstraint('tenant_id', 'company_id', 'permission', 'line', 'fraction', name='uq_fraction_rule_octave_permission_line_fraction'),        
-        {"schema": "a76"}
+        PrimaryKeyConstraint("id", name="fraction_rule_octave_pkey"),
+        ForeignKeyConstraint(
+            ["tenant_id"], ["a76.tenants.id"], name="fk_fraction_rule_octave_tenant"
+        ),
+        ForeignKeyConstraint(
+            ["company_id"], ["a76.company.id"], name="fk_fraction_rule_octave_company"
+        ),
+        UniqueConstraint(
+            "tenant_id",
+            "company_id",
+            "permission",
+            "line",
+            "fraction",
+            name="uq_fraction_rule_octave_permission_line_fraction",
+        ),
+        {"schema": "a76"},
     )
-    
+
     id: Mapped[int] = mapped_column(Integer, primary_key=True)
     tenant_id: Mapped[int] = mapped_column(Integer, nullable=False, index=True)
     company_id: Mapped[int] = mapped_column(Integer, nullable=False, index=True)
-    
+
     permission: Mapped[str] = mapped_column(String(20))
     line: Mapped[int] = mapped_column(Integer)
     fraction: Mapped[str] = mapped_column(String(10))
-    

backend/api/v1/modules/a76/fraction_rule_octave/routes.py

@@ -12,8 +12,7 @@ router = APIRouter(prefix="/fraction_rule_octave", tags=["FractionRuleOctave"])
 
 @router.get("/", response_model=List[FractionRuleOctaveResponseDTO])
 async def list_fractions(
-    db: Session = Depends(get_core_db),
-    current_user: dict = Depends(get_current_user)
+    db: Session = Depends(get_core_db), current_user: dict = Depends(get_current_user)
 ):
     """
     List all FractionRuleOctave entries.
@@ -28,13 +27,15 @@ async def list_fractions(
     return db.query(FractionRuleOctaveService).all()
 
 
-@router.get("/{permission}/{line}/{fraction}", response_model=FractionRuleOctaveResponseDTO)
+@router.get(
+    "/{permission}/{line}/{fraction}", response_model=FractionRuleOctaveResponseDTO
+)
 async def read_fraction(
     permission: str,
     line: int,
     fraction: str,
     db: Session = Depends(get_core_db),
-    current_user: dict = Depends(get_current_user)
+    current_user: dict = Depends(get_current_user),
 ):
     """
     Get a specific FractionRuleOctave by its composite key.
@@ -52,11 +53,15 @@ async def read_fraction(
     return frac
 
 
-@router.post("/", response_model=FractionRuleOctaveResponseDTO, status_code=status.HTTP_201_CREATED)
+@router.post(
+    "/",
+    response_model=FractionRuleOctaveResponseDTO,
+    status_code=status.HTTP_201_CREATED,
+)
 async def create_frac(
     frac_data: FractionRuleOctaveCreateDTO,
     db: Session = Depends(get_core_db),
-    current_user: dict = Depends(get_current_user)
+    current_user: dict = Depends(get_current_user),
 ):
     """
     Create a new FractionRuleOctave entry.
@@ -71,13 +76,15 @@ async def create_frac(
     return FractionRuleOctaveService.create_frac(db, frac_data)
 
 
-@router.delete("/{permission}/{line}/{fraction}", status_code=status.HTTP_204_NO_CONTENT)
+@router.delete(
+    "/{permission}/{line}/{fraction}", status_code=status.HTTP_204_NO_CONTENT
+)
 async def delete_fraction(
     permission: str,
     line: int,
     fraction: str,
     db: Session = Depends(get_core_db),
-    current_user: dict = Depends(get_current_user)
+    current_user: dict = Depends(get_current_user),
 ):
     """
     Delete a FractionRuleOctave by its composite key.
@@ -91,4 +98,4 @@ async def delete_fraction(
 
     frac = FractionRuleOctaveService.delete_fraction(db, permission, line, fraction)
     if not frac:
-        raise HTTPException(status_code=404, detail="FractionRuleOctave not found")
+        raise HTTPException(status_code=404, detail="FractionRuleOctave not found")

backend/api/v1/modules/a76/fraction_rule_octave/services.py

@@ -5,14 +5,21 @@ from . import models, dto
 Service layer for FractionRuleOctave.
 """
 
+
 class FractionRuleOctaveService:
     @staticmethod
-    def get_fraction_by_permission_line(db: Session, permission: str, line: int, fraction: str):
-        return db.query(models.FractionRuleOctave).filter(
-            models.FractionRuleOctave.permission == permission,
-            models.FractionRuleOctave.line == line,
-            models.FractionRuleOctave.fraction == fraction
-        ).first()
+    def get_fraction_by_permission_line(
+        db: Session, permission: str, line: int, fraction: str
+    ):
+        return (
+            db.query(models.FractionRuleOctave)
+            .filter(
+                models.FractionRuleOctave.permission == permission,
+                models.FractionRuleOctave.line == line,
+                models.FractionRuleOctave.fraction == fraction,
+            )
+            .first()
+        )
 
     @staticmethod
     def create_frac(db: Session, frac_data: dto.FractionRuleOctaveCreateDTO):
@@ -24,8 +31,10 @@ class FractionRuleOctaveService:
 
     @staticmethod
     def delete_fraction(db: Session, permission: str, line: int, fraction: str):
-        frac = FractionRuleOctaveService.get_fraction_by_permission_line(db, permission, line, fraction)
+        frac = FractionRuleOctaveService.get_fraction_by_permission_line(
+            db, permission, line, fraction
+        )
         if frac:
             db.delete(frac)
             db.commit()
-        return frac
+        return frac