add features

backend/src/database/migrations/021_add_motorisiert_to_ausruestung_kategorien.sql

@@ -5,8 +5,11 @@
 ALTER TABLE ausruestung_kategorien
     ADD COLUMN IF NOT EXISTS motorisiert BOOLEAN NOT NULL DEFAULT FALSE;
 
--- Recreate the helper view to include the new column
-CREATE OR REPLACE VIEW ausruestung_mit_pruefstatus AS
+-- DROP + CREATE is required because CREATE OR REPLACE VIEW cannot change the
+-- column list of an existing view (PostgreSQL error 42P16).
+DROP VIEW IF EXISTS ausruestung_mit_pruefstatus;
+
+CREATE VIEW ausruestung_mit_pruefstatus AS
 SELECT
     a.*,
     k.name        AS kategorie_name,