. Add learner achievement tracking

[DeFiVC]

What: Add an achievement system that tracks milestones (first course, perfect score, speed learner).

Why: Gamification drives engagement. Achievements motivate continued learning.

Scope: Add Achievement struct with type, earned_at. Add earn_achievement internal function. Add get_achievements(learner) query function.

Acceptance criteria:

• Achievements are tracked
• Achievements are queryable
• Achievements emit events
• Achievement types are extensible

Technical context: contracts/progress-tracker/src/lib.rs — progress functions.

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[xtep103]

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Hi there, I’ve carefully reviewed the issue details and I’m confident I can provide a clean, efficient, and maintainable solution.

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[Thoni76]

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I plead with you in the name of God please assign me this issue boss

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[sladeoj]

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hi maintainer i would love to take this issue please

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[directorfloo]

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[TechBroAfrica]

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[Muyideen-js]

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Hi, I can fix this

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[Sammydz456]

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hi maintainer i would love to take this issue please

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[Mitch5000]

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Can I work on this?

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[rhemy-arc]

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Can i work on this task

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[humblezdan]

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hi maintainer i would love to take this issue please

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Congratulations, @rhemy-arc! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

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