Set a default of 0 when a rating value is null when calculating rank

[HutchyBen]

ficxs #1674

[zkldi]

not correct! bpi can be negative. null should sort lower than all numbers, not just 0. Don't solve this with ?? -Infinity either. There is a proper way to do this with sql.

[HutchyBen]

unapprove!! unapprove ill see what that fail was

[HutchyBen]

the test is literally LOL?
it("returns ranking 1 when user rating is null (no one can be strictly greater than null)", async () => {

[HutchyBen]

ill change the test add like another player and say null user should be last