Implement Invite Code Expiration System

[SudiptaPaul-31]

Feature: Invite Code Expiration System

Description
Add expiration support for group invitation codes to ensure controlled access and improved security.

Tasks

• Add expiration fields (expiresAt, maxUsage) to database schema
• Validate invite codes before joining (check expiration and usage limits)
• Auto-invalidate expired codes (time-based or usage-based)
• Provide clear error handling for invalid/expired codes
• Add optional configuration for group owners to set expiration rules

Acceptance Criteria

• Expired codes cannot be used to join groups
• Proper error messages returned (e.g., "Invite code expired", "Invite code invalid")
• Database cleanup supported (expired codes removed or flagged)
• Expiration rules configurable at invite creation (time limit or usage limit)
• System logs expiration events for audit purposes

[ojuotimi932]

@ojuotimi932 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi Maintainer, Can i work on this. Kindly assign

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[TheShnider]

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

Hi. I have reviewed this issue and would like to work on it.

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[Oyinkans0la12]

@Oyinkans0la12 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

I can resolve this issue, please assign.

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[emickwrld]

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

Hi, I’m a smart contract and a full-stack web developer, I have read through the issue and it’s something I’m capable of doing. Please assign me this work.

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[drips-wave]

Congratulations, @ojuotimi932! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

🧑‍💻 @ojuotimi932: 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.

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