🐛 [bq import script] - Data consistency

[cabljac]

In the BQ import script, I have witnessed a bit of data inconsistency for large collections (of 5 million docs +)

This was running it with multiple threads, and with collection group query enabled.

For a collection of about 6.5 million documents I saw a discrepancy of plus or minus about 1000 documents.

I can't say how consistent this discrepancy was, as I only had a chance to run the script a couple of times on this large collection.

[cabljac]

I think this was probably due to a missing await, which will be fixed in the next release. I will reopen this if we see any sign of it happening again.