misc(aurora): convert Change.from_dict() to use utils.timedelta_from_string()

aurora/models/change.py

@@ -4,6 +4,7 @@ from typing import Literal, Optional
 
 from redbot.core.bot import Red
 
+from ..utilities.utils import timedelta_from_string
 from .base import AuroraBaseModel
 from .partials import PartialUser
 
@@ -31,8 +32,7 @@ class Change(AuroraBaseModel):
         if isinstance(data, str):
             data = json.loads(data)
         if "duration" in data and data["duration"] and not isinstance(data["duration"], timedelta) and not data["duration"] == "NULL":
-            hours, minutes, seconds = map(int, data["duration"].split(':'))
-            duration = timedelta(hours=hours, minutes=minutes, seconds=seconds)
+            duration = timedelta_from_string(data["duration"])
         elif "duration" in data and isinstance(data["duration"], timedelta):
             duration = data["duration"]
         else: