MediaId UUID migration

[nichwall]

This PR fixes #2324.

This adds a migration to convert the mediaId column in the libraryItems table to be a UUID instead of a UUIDv4. After performing the migration on my test server, everything still seemed to be linked correctly between mediaProgress, libraryItem, books, and podcasts, where deleting a book did cascade correctly. I was also able to scan my library and saw new rows created correctly in each table.

The only performance difference I saw was in the noise (less than 3 ms difference on any given query).

I am a little hesitant about this change if anything goes wrong during the migration due to SQLite copying the table, creating a new table, then moving data over. From my reading, this can trigger delete cascades, but I did not experience that in my testing. Additional reading at https://sequelize.org/docs/v6/other-topics/query-interface/#changing-and-removing-columns-in-sqlite and https://stackoverflow.com/a/70486686

[advplyr]

There are 5 other models that I added into the migration still using UUIDv4.
I tested this thoroughly and didn't come across any issues.
Updated it for v2.17.0.

Thanks!