feat: unify scope settings and catalog table interactions

backend/app/preparations/routes.py

@@ -1,6 +1,6 @@
 """Authenticated preparation and field-directory endpoints."""
 
-from typing import Annotated
+from typing import Annotated, Literal
 
 from fastapi import APIRouter, Depends, HTTPException, Query, Request
 from sqlalchemy import delete, select
@@ -55,9 +55,11 @@ async def preparations(
     scope_key: str | None = None,
     limit: int = Query(25, ge=1, le=100),
     offset: int = Query(0, ge=0),
+    sort: Literal["name", "created_at", "updated_at"] = "updated_at",
+    direction: Literal["asc", "desc"] = "desc",
 ):
     async with request.app.state.sessions() as db:
-        return await Preparations(db).list(q, scope_key, limit, offset)
+        return await Preparations(db).list(q, scope_key, limit, offset, sort, direction)
 
 
 @router.post("/data-preparations", status_code=201)