If we upgrade V2 to V3, we have existing database with millions of record and creating index may be time-consuming.
To anticipate it, Indexes IX_Streams_IdOriginal and IX_Streams_IdOriginalReversed (and other indexes as well) better to specify WITH (ONLINE=ON)

Unfortunately it is required to add conditional logic as not all sql server editions support WITH (ONLINE) https://stackoverflow.com/questions/50407490/how-to-create-nonclustered-index-with-online-if-available

Btw, even WITH (ONLINE=ON) may cause blocks on the final stage
https://dba.stackexchange.com/questions/41181/why-does-create-index-with-online-on-block-access-to-the-table-over-a-period/50139#50139