refactor: expand runtime contracts and debt ratchets

app/db/models/downloadfailure.py

@@ -4,7 +4,7 @@ from sqlalchemy import Float, Index, Integer, String, delete, select
 from sqlalchemy.orm import Mapped, Session, mapped_column
 
 from app.db.base import Base, execute_dml, get_id_column
-from app.db.decorators import db_query, db_update
+from app.db.decorators import db_update
 from app.db.models._constraints import media_identity_constraint
 
 
@@ -62,7 +62,6 @@ class DownloadFailure(Base):
     )
 
     @classmethod
-    @db_query
     def get_active_by_fingerprints(
             cls,
             db: Session,
@@ -81,7 +80,6 @@ class DownloadFailure(Base):
         ).scalars().all())
 
     @classmethod
-    @db_update
     def record_failure(
             cls,
             db: Session,