Merge Sexpedition hotfix - research economics

Big shoutout to those who reported problems with RP and softlocks!(ﾉ´ヮ`)ﾉ*: ･ﾟ

Turns out, bandage gag just didn't have any reward for researching it by mistake, but I still counted it for the overall prices somehow...

Changelog

• Bandage gag now gives 15 RP for research as it should've from the beginning (￣▽￣)
• Added safeguards so players can’t spend Research Points in a way that blocks progression (ง'̀-'́)ง
• Fully unlocking your excavation area now requires reaching the Valley of Queens first to prevent softlock (｀・ω・´)
• Supporter Edition ending progression now requires reaching the Tar Pits first (☆ω☆)
• Fixed delivery order availability checks (＾▽＾)