printedparts stage 6: RBAC - declared permissions gate every mutation

get_permissions declares view/create/edit/delete/restock (seeded on
install/enable and by flask seed permissions); every write route adds
require_permission on top of jwt_required. New test proves
authentication alone is not authorization: a role-less member gets
403 where an admin succeeds.

plugins/printedparts/api/routes.py

@@ -17,6 +17,7 @@ from shopdb.api import (
     ErrorCodes,
     get_pagination_params,
     paginate_query,
+    require_permission,
 )
 
 from ..models import PrintedItem
@@ -95,6 +96,7 @@ def _mint_itemcode(item):
 
 @printedparts_bp.route('/items', methods=['POST'])
 @jwt_required()
+@require_permission('printedparts.create')
 def create_item():
     """Create a printed item; the itemcode is minted from the row id."""
     data = request.get_json() or {}
@@ -124,6 +126,7 @@ def create_item():
 
 @printedparts_bp.route('/items/<int:item_id>', methods=['PUT'])
 @jwt_required()
+@require_permission('printedparts.edit')
 def update_item(item_id: int):
     """Update catalog fields. Quantity moves ONLY through the ledger."""
     item = db.session.get(PrintedItem, item_id)
@@ -144,6 +147,7 @@ def update_item(item_id: int):
 
 @printedparts_bp.route('/items/<int:item_id>', methods=['DELETE'])
 @jwt_required()
+@require_permission('printedparts.delete')
 def delete_item(item_id: int):
     """Soft-retire an item; its ledger history stays."""
     item = db.session.get(PrintedItem, item_id)
@@ -159,6 +163,7 @@ def delete_item(item_id: int):
 
 @printedparts_bp.route('/items/<int:item_id>/image', methods=['POST'])
 @jwt_required()
+@require_permission('printedparts.edit')
 def upload_item_image(item_id: int):
     """Upload (or replace) the photo for an item (multipart file=<image>)."""
     item = db.session.get(PrintedItem, item_id)
@@ -195,6 +200,7 @@ def serve_item_image(filename):
 
 @printedparts_bp.route('/items/<int:item_id>/image', methods=['DELETE'])
 @jwt_required()
+@require_permission('printedparts.delete')
 def delete_item_image(item_id: int):
     """Clear an item image; delete the file only if this plugin owns it."""
     item = db.session.get(PrintedItem, item_id)
@@ -238,6 +244,7 @@ def _ledger_write(item, transactiontype, quantitychange, sso, name, reason=None)
 
 @printedparts_bp.route('/items/<int:item_id>/restock', methods=['POST'])
 @jwt_required()
+@require_permission('printedparts.restock')
 def restock_item(item_id: int):
     """Add freshly printed stock. Body: {quantity, badge}."""
     item = db.session.get(PrintedItem, item_id)
@@ -260,6 +267,7 @@ def restock_item(item_id: int):
 
 @printedparts_bp.route('/items/<int:item_id>/adjust', methods=['POST'])
 @jwt_required()
+@require_permission('printedparts.restock')
 def adjust_item(item_id: int):
     """Correct the count (damage, recount). Body: {quantitychange, reason, badge}."""
     item = db.session.get(PrintedItem, item_id)