Add Quest Expiry Grace Period Configuration

[RUKAYAT-CODER]

Overview

The expiry grace buffer after deadline is a hard-coded constant. Quest creators may need different grace periods for different quest types, but currently this cannot be set per quest.

Specifications

Features:

• Optional grace_period_seconds: Option in BatchQuestInput and Quest`n- Falls back to global default if not set
• Admin can update the global default

Tasks:

• Add grace_period_seconds to Quest type
• Update quest.rs registration to store per-quest grace period
• Update expiry check logic

Impacted Files:

• contracts/earn-quest/src/types.rsn- contracts/earn-quest/src/quest.rsn

Acceptance Criteria:

• Quest with custom grace period uses that value for expiry check
• Quests without explicit value use global default

[Senorespecial]

I would love to work on this issue, please assign the issues to me so i Can work on it ASAP

[grantfox-oss]

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Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #1718)
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[Emelie-Dev]

@Emelie-Dev has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi, I would love to work on this issue

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[taiwoMoil]

@taiwoMoil has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hello, I’d like to take this issue and contribute a fix. I’m familiar with the technologies involved and will investigate the problem before creating a pull request. Looking forward to contributing to the project.

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[Caneryy]

@Caneryy has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hello, please can I work on this issue?

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Congratulations, @Emelie-Dev! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

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