feat(receiving): technicians can count+close receivings from the tablet

ACL: grant group_fp_technician write+create on fp.receiving / line / damage.
sudo the internal sale.order x_fc_receiving_status write so a non-privileged
technician isn't blocked inside action_mark_counted / action_close.

Tests deferred to entech (local Docker unavailable this session).

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

fusion_plating/fusion_plating_receiving/tests/__init__.py

@@ -1,3 +1,4 @@
 # -*- coding: utf-8 -*-
 from . import test_carrier_fields
+from . import test_technician_receiving_acl