Add nil checks for team properties

[umr-1000]

Add checks for nil values in team streak and rating.

Summary

There is currently an error on the Liquipedia Rating portal page (https://liquipedia.net/rocketleague/Portal:Rating) that prevents the rating list being created:

Module:Ratings/Display/List:70: attempt to compare number with nil (stack trace logged)

The following change allows the rating list to work as usual on the portal page by discarding teams which return nil values in their streak or rating.

How did you test this change?

Tested the changes using |dev=umr on my userspace (https://liquipedia.net/rocketleague/User:Umr_1000/draft). The rating list is generated with the given change without any issues.

[Copilot]

Pull request overview

This PR adds nil checks for team streak and rating properties to prevent a runtime error on the Liquipedia Rating portal page. The error was occurring when attempting to compare nil values with numbers.

• Adds nil validation before processing team data in the ratings list display
• Skips teams with missing streak or rating values to allow the page to render

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[Copilot]

Skipping teams with nil streak or rating values will cause the rank numbers to be incorrect. The rank is passed from Array.forEach which counts all teams including skipped ones. Consider filtering teams before the forEach loop to maintain accurate rankings, or adjust the rank counter when teams are skipped.

[truongdongnguyen600-hue]

Nếu

[Copilot]

The parentheses around the nil checks are unnecessary in Lua. The condition can be simplified to: if team.streak == nil or team.rating == nil then

[hjpalpha]

better would be to filter before the forEach loop

	local validTeams = Array.filter(teams, function(team)
		return team.streak ~= nil and team.rating ~= nil
	end)

	Array.forEach(validTeams, function(team, rank)
.....