Skip existence checks for user replay stats

[notbakaneko]

#12945 and #12946 take 2, with extra null handling

duplicates fireTransformer to insert our extra null handling

[notbakaneko]

Causes other problem handling nulls
shouldn't have assumed transform(null) = null

[nanaya]

is the problem just the counting or fetching the rows as well?

[notbakaneko]

it's both; the exists against large tables has large overheads in production.

Also, it doesn't make sense if the count doesn't match, although, if it's not rendered.... 🤔

[nanaya]

the queries I've been seeing are all on the count though...? (also the matchmaking thing change here doesn't match the pr title?)

the replay count specifically can probably be fixed by doing ->limit(maxResults)->pluck('score_id')->count() instead

[notbakaneko]

we'll hold off on this for now