`TopResult` was the one projection here that shipped `inLibrary` and no
local id, so the top-results cards had no choice but to read the weaker
flag. Every sibling model — `MBArtist`, `MBReleaseGroup`, `MBRecording`
— already carries `LocalID`, and the candidate builders had the value
in hand at every construction site.
`LocalID` is set and cleared by a test against `audio_files`, so it
means "there is something of mine here". `InLibrary` is written by the
same pass but is a one-way ratchet the prune can only clear alongside a
local id; it stays for scoring, which is where an approximate answer is
fine.
logan
41c41a860e