Revert "Better logging."

This reverts commit 8ef8b446c23c94151bce8eddf76c6c450004ef74.
Revert "Loading all Booking PKs at once."

This reverts commit 226854b1ccf1a558f9ad40b288c8da0367d280de.
Revert "Trying bulk load to speed up ETL."

This reverts commit c8df42112377f69e2ea50e88cd819f6c194aa32a.
Revert "Trying bulk load to speed up ETL."

This reverts commit 42d09c0a938510567e9da0bd32c9fb4ace7aac06.