Add patch selection to hero winrates

[Cepheid-UK]

As we do with map winrates, we should also allow hero winrates to be sorted by patches.

[MichaelDeitz]

Are Hero Winrate (HeroStatsQueryHandler / HeroWinRate) and Hero Picked stats (HeroPlayedStats / HeroStatByPick) intended to be separate datasets? Right now, they produce different values (49.76% vs 41.9%). I have added the patch selection, but I need to add it to the backend. Wanted to break it out. So I can create a task in the backend.

If the goal is to support patch filtering and make Hero stats consistent (similar to the WinrateTab system), then the HeroWinrate dataset would need to be extended in the backend.

This would involve:

Adding patch support to the HeroWinrate data model (HeroWinRate / OverallHeroWinRatePerHero)
Persisting stats per patch during match processing (similar to how race winrate uses "All" + specific patch)
Extending HeroStatsQueryHandler to filter/aggregate by patch
Ensuring both datasets respond to the selected patch consistently (or explicitly defining that they should not)

Does everyone agree or not?