Auto-sync Devpost hackathon winners

[notsointresting]

Automated background sync of ended Devpost hackathons and winning projects.

• All imported entries are marked as unverified ("Source pending review")
• Summaries are factually generated from structured fields (CC BY 4.0 compliant)
• Passed schema validation and duplicate checks

Please review the sources and verify entries when confirmed.

[netlify]

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[github-actions]

HackWinnerDB Data Change

+ 1 Hackathon
+ 3 Projects
+ 3 Winning Entries
+ 10 Technologies referenced

Sources: 3/3 provided
Validation: run by the CI workflow