Update:

The migration is in progress.  Small correction from before:

 

Correction: m1 instead of m2, and the new data will be written to db1048.

Currently we're cautiously optimistic that we haven't dropped any data.  However, for now, db1047 is not receiving any new data from EventLogging.  All the new data is going into db1048.  The old data is being loaded into 1048 as well, and should complete over the next day or so.  Once done, we'll replicate to db1047 from db1048 and that should be it.  We'll keep updating this thread.