packages/django-dramatiq-postgres: broker: close django connections on consumer close (cherry-pick #18833 to version-2025.10) (#18835)

Co-authored-by: Marc 'risson' Schmitt <marc.schmitt@risson.space>
Co-authored-by: Norman Ziebal <norman.ziebal@mail.schwarz>
close django connections on consumer close (#18833)

packages/django-dramatiq-postgres/django_dramatiq_postgres/broker.py

@@ -529,3 +529,7 @@ class _PostgresConsumer(Consumer):
                     conn.close()
                 except DATABASE_ERRORS:
                     pass
+            try:
+                connections.close_all()
+            except DATABASE_ERRORS:
+                pass