feat(backend): consolidate queue logic for scheduling

backend/database/models/classification.py

@@ -1,14 +1,8 @@
-from ..connection import DatabaseConnection
+from dataclasses import dataclass
+from ._base import BaseModel
 
-class Classification:
-    def __init__(self, classification_name: str):
-        self.classification_name = classification_name
 
-    def save(self, db: DatabaseConnection):
-        query = "INSERT INTO Classifications (ClassificationName) VALUES (?)"
-        db.execute_query(query, (self.classification_name,))
-
-    @classmethod
-    def get_all(cls, db: DatabaseConnection):
-        query = "SELECT * FROM Classifications"
-        return db.execute_query_with_return(query)
+@dataclass()
+class Classification(BaseModel):
+    ClassificationId: int
+    ClassificationName: str