contractnumber provider added, old provider number field only if no previous contact exist

backend/src/services/contract.service.ts

@@ -122,6 +122,7 @@ export async function getContractById(id: number, decryptPassword = false) {
       provider: true,
       tariff: true,
       contractCategory: true,
+      previousProvider: true,
       previousContract: {
         include: {
           energyDetails: { include: { meter: { include: { readings: true } }, invoices: true } },

backend/src/services/contractCockpit.service.ts

@@ -361,6 +361,17 @@ export async function getCockpitData(): Promise<CockpitResult> {
       summary.byCategory.missingData++;
     }
 
+    // 4b. KEINE VERTRAGSNUMMER BEIM ANBIETER
+    if (!contract.contractNumberAtProvider) {
+      issues.push({
+        type: 'missing_contract_number',
+        label: 'Vertragsnummer fehlt',
+        urgency: 'warning',
+        details: 'Vertragsnummer beim Anbieter fehlt',
+      });
+      summary.byCategory.missingData++;
+    }
+
     // 5. KEIN ANBIETER/TARIF
     if (!contract.providerId && !contract.providerName) {
       issues.push({