Generate Interactive update streams

[szarnyasg]

For SNB Interactive, updates are continuous and not bound to daily batches. Therefore, inserts and deletes go into files sorted by creationDate/deletionDate (resp.).

For the inserts, each line should define an operation, which necessitates merging all outgoing edges (not just 1-N but also N-M ones) and attributes into the file. E.g. Forum.csv should have the Forum_hasTag_Tag edges merged as tagIds.

These features are currently implemented as Python scripts in https://github.com/ldbc/ldbc_snb_interactive_driver/tree/main/scripts

[szarnyasg]

The set of files is the same 8 files as for the deletes but the remaining dynamic files (e.g. Forum_hasTag_Tag) have to be joined & aggregated into them (as nested attributes). This is currently performed by a Python/DuckDB script but ultimately it should be implemented by Datagen.