Fixed flaky test

Author: alexis-

tests/Cloudflare.NET.Tests/IntegrationTests/KvApiIntegrationTests.cs

@@ -645,11 +645,15 @@ public async Task BulkDeleteAsync_CanDeleteMultipleKeys()
     result.SuccessfulKeyCount.Should().Be(3);
     result.UnsuccessfulKeys.Should().BeNullOrEmpty();
 
-    // Verify they are deleted
+    // Verify they are deleted (retry for eventual consistency - no delays, just retries)
+    const int maxRetries = 10;
     foreach (var key in keys)
     {
-      var value = await _sut.GetValueAsync(_namespaceId, key);
-      value.Should().BeNull($"{key} should be deleted");
+      string? value = "not null";
+      for (var attempt = 1; attempt <= maxRetries && value is not null; attempt++)
+        value = await _sut.GetValueAsync(_namespaceId, key);
+
+      value.Should().BeNull($"{key} should be deleted after {maxRetries} retries");
     }
   }