fix: clean up stale db connection in enrollment update thread

Author: Jay-Lalwani

tcf_website/api/views.py

@@ -2,6 +2,7 @@
 """DRF Viewsets"""
 import asyncio
 from threading import Thread
+from django.db import connection
 from django.db.models import Avg, Sum
 from django.http import JsonResponse
 from rest_framework import viewsets
@@ -195,6 +196,8 @@ def _run_update():
                 asyncio.run(update_enrollment_data(pk))
             except (asyncio.TimeoutError, requests.RequestException, ValueError) as exc:
                 print(f"Enrollment update failed for course {pk}: {exc}")
+            finally:
+                connection.close()
 
         thread = Thread(target=_run_update, daemon=True)
         thread.start()