Rename variable to hasAnyDatabaseGeneratedKeys for clarity

Co-authored-by: PhenX <42170+PhenX@users.noreply.github.com>

Author: Copilot

src/PhenX.EntityFrameworkCore.BulkInsert/Graph/GraphBulkInsertOrchestrator.cs

@@ -53,14 +53,14 @@ public async Task<GraphInsertResult<T>> InsertGraph<T>(
         var totalInserted = 0;
         var graphMetadata = new GraphMetadata(_context, options);
 
-        // Check if any entity types have generated keys - if so, provider must support returning IDs
-        var hasAnyGeneratedKeys = collectionResult.InsertionOrder.Any(entityType =>
+        // Check if any entity types have database-generated keys - if so, provider must support returning IDs
+        var hasAnyDatabaseGeneratedKeys = collectionResult.InsertionOrder.Any(entityType =>
         {
             var efEntityType = graphMetadata.GetEntityType(entityType);
             return efEntityType?.FindPrimaryKey()?.Properties.Any(p => p.ValueGenerated != Microsoft.EntityFrameworkCore.Metadata.ValueGenerated.Never) == true;
         });
 
-        if (hasAnyGeneratedKeys && !provider.SupportsOutputInsertedIds)
+        if (hasAnyDatabaseGeneratedKeys && !provider.SupportsOutputInsertedIds)
         {
             throw new NotSupportedException(
                 $"The bulk insert provider '{provider.GetType().Name}' does not support returning generated IDs, " +