feat: scope blacklists and paginate phone segments

api/src/send-chain/send-chain.service.spec.ts

@@ -490,6 +490,7 @@ describe('SendChainService', () => {
     await expect(
       service.previewImport({
         tenantId: 'tenant-1',
+        applicationId: 'app-1',
         content: 'phoneNumber,code\n13800000001,1234\n13800000001,1234\nbad,1234\n13800000003,1234\n13900000001,',
         requiredVariables: ['code'],
       }),
@@ -507,6 +508,10 @@ describe('SendChainService', () => {
         ]),
       }),
     );
+    expect(prisma.enterpriseBlacklist.findMany).toHaveBeenCalledWith({
+      where: { tenantId: 'tenant-1', applicationId: 'app-1', status: 'active' },
+      select: { phoneNumber: true },
+    });
   });
 
   it('adds queued message jobs for a batch task', async () => {