Add /api/leaderboard/global endpoint

[greatest0fallt1me]

Description

This is a backend issue for the GrantFox campaign. This is a backend issue for the GrantFox FWC26 campaign. Global leaderboard across all markets.

Requirements and Context

• Implement per the description
• Add focused tests for the change
• Document any API/visible changes
• Adhere to repo's lint and code style
• Must be secure, tested, and documented
• Should be efficient and easy to review

Suggested Execution

1. Fork the repo and create a branch

   git checkout -b feature/global-leaderboard

2. Implement changes
   • src/routes/leaderboard/global.ts (new)
3. Test and commit
   • Run the repo's standard test suite and lint
   • Cover edge cases; include output in the PR

Example commit message

feat: global leaderboard

Acceptance Criteria

• Implementation matches the description
• Tests added and passing
• Code review approved
• Docs updated

Guidelines

• Minimum 90% test coverage on changed lines
• Input validation at the boundary; standardized error envelope
• Structured logging with correlation IDs
• Clear documentation and inline comments
• Timeframe: 96 hours

[Awointa]

@Awointa has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I'd like to work on this issue. I'll implement /api/leaderboard/global in src/routes/leaderboard/global.ts with input validation, standardized error envelope, structured logging with correlation IDs, and focused tests covering edge cases. Branch: feature/global-leaderboard.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Awointa to this issue.

[drips-wave]

Congratulations, @Awointa! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @Awointa: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊

[greatest0fallt1me]

Hey @Awointa 👋 — you've been assigned to this issue based on your DripsWave application.

Quick reminders:

• Draft PR early and link it with Closes #<issue-number> so the DripsWave bot picks it up.
• Please respect the 4 assignments per org cap (DripsWave will auto-unassign anything beyond that).
• Ping in Discord for questions or unblocks: https://discord.gg/WC53JxDqx

Looking forward to your PR — good luck! 🚀

[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox as part of the Official Campaign | FWC26 campaign!

@Awointa's PR #452 was approved and merged by @greatest0fallt1me.

🏆 @Awointa: You earned 40 FoxPoints for this contribution! Your current tier: Builder (1,132 total points). Track your full progress on GrantFox.

👏 Great work, @Awointa! Keep contributing to Predictify-org.