fix(delivery): deliver orders with father-articles and no-payment orders

- Treat an article that has become a father (nIstVater=1) as a free
  position (kArtikel=0) with the name kept: VersandIntern.vBestellPosOffen
  joins tArtikel with nIstVater=0, so such positions could never be
  reserved and failed with "insufficient stock after POS shortage
  booking" (e.g. Becks 42000030).
- Recalculate tAuftragPositionEckdaten before deliverOrder so orders
  without payments get their positions reserved too (previously only
  insertPayment triggered the recalculation).

Also adds debug logging across the delivery pipeline (reserve, commit,
deliver, session, stock-shortage, create-order).

src/endpoints/index.js

@@ -4,9 +4,10 @@ import * as client from './client.js';
 import * as customergroup from './customergroup.js';
 import * as deletedEntity from './deleted-entity.js';
 import * as init from './init.js';
+import * as newpin from './newpin.js';
 import * as order from './order.js';
 import * as pimage from './pimage.js';
 import * as product from './product.js';
 import * as productcomposite from './productcomposite.js';
 
-export const endpoints = [client, init, category, product, productcomposite, deletedEntity, pimage, cimage, customergroup, order];
+export const endpoints = [client, newpin, init, category, product, productcomposite, deletedEntity, pimage, cimage, customergroup, order];