[Security] Add Suspicious Activity Monitoring

[Abd-Standard]

Description

Create automated detection for unusual notification activity patterns.

Tasks
Define monitoring rules.
Track abnormal usage patterns.
Generate alerts.
Create dashboards.

Acceptance Criteria
Suspicious activity generates alerts.
Monitoring remains performant.
Rules are configurable.

[AdityaK9822]

@AdityaK9822 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Please let me work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @AdityaK9822 to this issue.

[drips-wave]

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

🧑‍💻 @dev-chinasa: 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

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

🌊 Happy Wave 🌊