catalog search/sort, edit-page characteristics, preferred vendor per article

backend/src/database/migrations/060_add_bevorzugter_lieferant.sql

@@ -0,0 +1,3 @@
+-- Add preferred vendor to catalog items
+ALTER TABLE ausruestung_artikel
+  ADD COLUMN IF NOT EXISTS bevorzugter_lieferant_id INT REFERENCES lieferanten(id) ON DELETE SET NULL;