feat(fusion_plating_receiving): open Receiving menu to Technician + technician shipping ACLs

- Backend "Shipping & Receiving" menu lowered from Shop Manager to Technician
  (all higher roles inherit Technician, so none lose access).
- Technicians granted r/w/c on fp.outbound.package and the manual/generate
  label wizards — shipping parity with shop managers so they can generate
  outbound labels and manage packages in the backend.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

fusion_plating/fusion_plating_receiving/views/fp_receiving_menu.xml

@@ -25,11 +25,15 @@
     <!-- Renamed from "Receiving & Inspection" so the same dock workflow -->
     <!-- — parts coming in AND parts going out — lives in one place.    -->
     <!-- Logistics module reparents its 5 menu items under this root.   -->
+    <!-- 2026-06-02: opened to Technician (was Shop Manager+) so technicians
+         can browse + edit receiving in the backend, not just the tablet card.
+         All higher roles imply Technician, so they keep access; sales-only
+         roles (no Technician) stay excluded. Children inherit this gate. -->
     <menuitem id="menu_fp_receiving_root"
               name="Shipping &amp; Receiving"
               parent="fusion_plating.menu_fp_root"
               sequence="15"
-              groups="fusion_plating.group_fp_shop_manager_v2"/>
+              groups="fusion_plating.group_fp_technician"/>
 
     <!-- Inbound (sequences 10–30) -->
     <menuitem id="menu_fp_receiving_all"