OSPP Follow-up issues

[yangxk1]

Describe the enhancement requested

kuzu-extension

• [ ] Contribute kuzu-extension to kuzu/ladybug
• [ ] Use a lower-level data transformation method

ldbc-snb datagen

• [ ] Merge ldbc-snb-datagen branch to main
• [ ] Fix excessive memory consumption
• [ ] Support user-defined parameters and larger SF

Component(s)

Spark, C++, Documentation

[yangxk1]

cc/ @gary-cloud @NineSue