Ausgangsbelege um Kostenstellenzuordnung erweitern

backend/db/schema/services.ts

@@ -13,6 +13,7 @@ import {
 import { tenants } from "./tenants"
 import { units } from "./units"
 import { authUsers } from "./auth_users"
+import { costcentres } from "./costcentres"
 
 export const services = pgTable("services", {
     id: bigint("id", { mode: "number" })
@@ -35,6 +36,8 @@ export const services = pgTable("services", {
 
     unit: bigint("unit", { mode: "number" }).references(() => units.id),
 
+    costcentre: uuid("costcentre").references(() => costcentres.id),
+
     serviceNumber: bigint("serviceNumber", { mode: "number" }),
 
     tags: jsonb("tags").default([]),