[BE-40] Add user statistics summary endpoint

[mftee]

Overview

Return aggregated statistics for the authenticated user: document counts, risk scores, and verifications inside backend/cmmty/.

Acceptance Criteria

• Create backend/cmmty/user-stats/ with module, controller, and service
• Implement GET /cmmty/users/me/stats protected by JWT guard
• Return: total documents, breakdown by status, average risk score, verified count, flagged count
• Use efficient aggregation queries
• Write unit tests for stats calculation

Contribution Folder

All files must be placed inside backend/cmmty/. Do not modify any file outside this folder.

How to Contribute

Comment on this issue to express interest, fork the repo, build inside backend/cmmty/ only, and open a PR targeting main.

[feyishola]

@feyishola has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

Hi, im Feyishola, a software developer with over 4 years of experience. Please i would like to handle this issue

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[KAMALDEEN333]

@KAMALDEEN333 has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

Hi maintainer can I work on this

ℹ️ Repo Maintainers: To accept this application, review their application or assign @KAMALDEEN333 to this issue.

[drips-wave]

Congratulations, @KAMALDEEN333! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on April 29, 2026.

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[drips-wave]

This issue has been completed by @KAMALDEEN333 as part of the Stellar Wave Program's 4th Wave 🥳

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