[FIX] computing image must be done in sudo

Indeed computing image can generate thumbnail and the api user may not have the access right for it

Author: sebastienbeau

shopinvader_image/models/shopinvader_image_mixin.py

@@ -10,7 +10,11 @@ class ShopinvaderImageMixin(models.AbstractModel):
     _description = "Shopinvader Image Mixin"
     _image_field = None
 
-    images = fields.Serialized(compute="_compute_image", string="Shopinvader Image")
+    images = fields.Serialized(
+        compute="_compute_image",
+        string="Shopinvader Image",
+        compute_sudo=True,
+    )
 
     def _compute_image(self):
         # Note: this computed field depend on the lang used in the context