Add Stems Support

[piazzatron]

• Migration
• Indexing Flow + Model Changes
• New Endpoint
• Filter out stems

[raymondjacobson]

I think you need to filter out stems in a few more places:

• search (not tag search)
• trending
• tracks (not including unlisted)
• playlists
• feed
• artist page feed

I think if you search for session.query(Track) that's good enough. Anywhere we filter out is_delete we should filter out is_stem I think

[piazzatron]

I think you need to filter out stems in a few more places:

* search (not tag search)
* trending
* tracks (not including unlisted)
* playlists
* feed
* artist page feed

I think if you search for session.query(Track) that's good enough. Anywhere we filter out is_delete we should filter out is_stem I think

Hmm - I think I got these all? Going through them 1 by 1:

• search: they're filtered out of search in track_search_query (search.py)
• trending: trending is done, these changes are in generate_trending.py
• tracks: It's filtered out in the tracks endpoint in get_tracks. I'm not filtering them out the unlisted endpoint intentionally so we can fetch them dapp side if need be (more on this in a design doc)
• playlists: where would I block this for playlists? Why not prevent this clientside like we do for unlisted?
• feed: filtered out in get_feed, L443 (and a few others).
• artist page: doesn't this just call the get_trackstracks endpoint?

[raymondjacobson]

I think you need to filter out stems in a few more places:

* search (not tag search)
* trending
* tracks (not including unlisted)
* playlists
* feed
* artist page feed

I think if you search for session.query(Track) that's good enough. Anywhere we filter out is_delete we should filter out is_stem I think

Hmm - I think I got these all? Going through them 1 by 1:

• search: they're filtered out of search in track_search_query (search.py)
• trending: trending is done, these changes are in generate_trending.py
• tracks: It's filtered out in the tracks endpoint in get_tracks. I'm not filtering them out the unlisted endpoint intentionally so we can fetch them dapp side if need be (more on this in a design doc)
• playlists: where would I block this for playlists? Why not prevent this clientside like we do for unlisted?
• feed: filtered out in get_feed, L443 (and a few others).
• artist page: doesn't this just call the get_trackstracks endpoint?

I think I must have seen something weird on GH. This looks right. My b!
VS Code reviewing is way better than GH. You right.

[dmanjunath]

Overall this looks really good 👍