`/favorite/getNewReleases` includes albums whose stream availability is
still in the future, so they appear in the Release Watch grid even
though `get_album` 404s as soon as the user clicks them. Same shape for
regional restrictions and label takedowns surfaced via `streamable=false`.
Add `release_date_stream` and `streamable` to the Album struct (both
optional with serde defaults so existing call sites stay happy) and
filter the response inside `v2_get_release_watch` after the artist
blacklist pass: skip any album marked `streamable=false` or whose
`release_date_stream` is strictly greater than today (UTC). The total
count gets adjusted alongside so pagination math stays consistent.
cc
vicrodh
3903086f36