feat: Add API endpoint for managing categories

app/core/dependencies.py

@@ -3,6 +3,7 @@ from sqlalchemy.ext.asyncio import AsyncSession
 from app.db.session import get_db
 from app.repositories.job_repository import JobRepository
 from app.services.job_service import JobService
+from app.services.category_service import CategoryService
 
 
 def get_job_repository(db: AsyncSession = Depends(get_db)) -> JobRepository:
@@ -13,3 +14,8 @@ def get_job_repository(db: AsyncSession = Depends(get_db)) -> JobRepository:
 def get_job_service(repo: JobRepository = Depends(get_job_repository)) -> JobService:
     """Dependency to retrieve JobService"""
     return JobService(repo)
+
+
+def get_category_service(db: AsyncSession = Depends(get_db)) -> CategoryService:
+    """Dependency to retrieve CategoryService"""
+    return CategoryService(db)

app/core/exceptions.py

@@ -18,3 +18,11 @@ class InvalidCSVException(AlemnoException):
     def __init__(self, detail: str):
         self.detail = detail
         super().__init__(detail)
+
+
+class CategoryAlreadyExistsException(AlemnoException):
+    """Raised when a category already exists"""
+
+    def __init__(self, name: str):
+        self.name = name
+        super().__init__(f"Category '{name}' already exists.")