shared catalog in Bestellungen, catalog picker in line items, Ersatzbeschaffung flag, vendor detail flash fix

backend/src/database/migrations/065_shared_catalog_and_request_type.sql

@@ -0,0 +1,9 @@
+-- Migration 065: Shared catalog + request type fields
+-- Link bestellpositionen to ausruestung_artikel (shared catalog)
+ALTER TABLE bestellpositionen
+  ADD COLUMN IF NOT EXISTS artikel_id INT REFERENCES ausruestung_artikel(id) ON DELETE SET NULL;
+
+-- Add replacement/return fields to ausruestung_anfrage_positionen
+ALTER TABLE ausruestung_anfrage_positionen
+  ADD COLUMN IF NOT EXISTS ist_ersatz BOOLEAN NOT NULL DEFAULT FALSE,
+  ADD COLUMN IF NOT EXISTS altes_geraet_zurueckgegeben BOOLEAN NOT NULL DEFAULT FALSE;