OSPP Follow-up issues

### Describe the enhancement requested

## kuzu-extension

- [ ] Contribute [kuzu-extension](https://github.com/apache/incubator-graphar/tree/kuzu-extension) to kuzu/ladybug
- [ ] Use a lower-level data transformation method

## ldbc-snb datagen

- [ ] Merge [ldbc-snb-datagen](https://github.com/apache/incubator-graphar/tree/ldbc-snb-datagen) branch to main
- [ ] Fix excessive memory consumption
- [ ] Support user-defined parameters and larger SF

### Component(s)

Spark, C++, Documentation

Start by reviewing the kuzu-extension and ldbc-snb-datagen directories linked in the issue, along with their branches and checklist items. The scope needs to be broken down and confirmed before work begins; completion would require addressing the listed merge, memory, parameter, scale, and data-transformation goals.

Written by the indexing model from the issue text.