Add Verification Expiry

[Naomi-Gift]

Verified status currently lasts forever. Verification may need to expire after a configured period.

Acceptance criteria:

• Verification records include expiry timestamp or ledger.
• Read APIs expose whether verification is active or expired.
• Admin can configure verification duration.
• Tests cover active, expired, and renewed verification.

[aymide1ee]

@aymide1ee has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

i would love to work on this issue.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @aymide1ee to this issue.

[Oby38]

@Oby38 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

I'm interested in tackling this task. I enjoy debugging complex logic and have the exact engineering experience needed to fix the root cause of this error efficiently.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Oby38 to this issue.

[drips-wave]

Congratulations, @aymide1ee! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @aymide1ee: 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

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