feat: MailJet list handling with DOI, webhook receiver and API endpoint

addresses #869cut134

tests/Command/BpnXmlSyncCommandTest.php

@@ -238,7 +238,7 @@ class BpnXmlSyncCommandTest extends TestCase
 
         $this->assertSame(Command::SUCCESS, $tester->getStatusCode());
         $this->assertStringContainsString('[contingents] Sync failed', $tester->getDisplay());
-        $this->assertStringContainsString('datasets: contingents', $tester->getDisplay());
+        $this->assertMatchesRegularExpression('/failed datasets:\s+contingents/', $tester->getDisplay());
     }
 
     public function testTravelTransferFailureDoesNotPreventContingentsSync(): void