Zaiah's Wonderful World - Stage 17 Team Progression

FTB Quests uses FTB Teams for shared quest progression. Players who want shared progression should join the same FTB Team.

Economy protection:
- Quest completion/progression may be shared by team membership.
- default_reward_team remains false so rewards are not automatically paid to every teammate.
- Repeatable Zing Buck contracts retain their existing cooldowns and reward amounts.
- Shop and currency exchange quests remain repeatable transactions rather than team-wide payouts.

Design goal: friends progress through realms, bosses, kingdom and tech together without multiplying currency simply because more players joined the team.
