Implement structured audit logging interceptor for sensitive administrative and financial endpoints

[Cjay-Cyber-2]

Description — what to implement and the why/impact.

Regulatory compliance and security governance for AI agent financial operations require an immutable, structured audit trail of every state-mutating request made to sensitive endpoints. This issue implements a NestJS interceptor that automatically records detailed audit metadata (actor, IP address, user agent, route, request body summary, and timestamp) for all financial and administrative controllers.

Context & Requirements — background, constraints, design references, edge cases;

• Located in src/common/interceptors or src/modules/audit.
• Filter out sensitive fields (such as passwords, private keys, secrets) from recorded request bodies.
• Save audit records asynchronously to the database via Prisma.

Acceptance Criteria — a checklist ("- [ ] ...") of specific, testable conditions that define "done".

• Create AuditLogInterceptor capturing request context, actor identity, and payload.
• Implement data sanitization helper to strip sensitive keys from audit payloads.
• Apply interceptor globally or via controller decorators on sensitive modules.
• Add unit tests verifying correct audit record creation and payload sanitization.

Implementation Guidance — likely files/modules to touch and a suggested approach

• Touch files under src/common/interceptors/ and src/modules/audit/.
• Follow existing repository patterns for interceptor implementation and dependency injection.

Testing & Validation — how the contributor should prove it works

• Run npm test and npm run typecheck.
• Add unit tests verifying sensitive secrets are omitted in saved audit entries.

Submission Guidelines — must open a PR that includes "Closes #"; assignment is required before starting; follow the repo's existing style and conventions.

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Wave complexity: Medium

[Akinsuyiphilip]

@Akinsuyiphilip has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

kindly assign

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

[veloura-dev]

@veloura-dev has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

pls maintainer ...I understand what's being asked here and I'm confident I can implement an accurate fix correctly and efficiently. pls assign i beg of you

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[Obaara293]

@Obaara293 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi maintainer, I've reviewed the issue and I've recognized the solution, kindly assign this to me to get the best result.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Obaara293 to this issue.

[humblezdan]

@humblezdan has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

hello maintainer i would love to work on this issue please

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

[drips-wave]

Congratulations, @Akinsuyiphilip! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @Akinsuyiphilip: 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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🌊 Happy Wave 🌊

[drips-wave]

This issue has been completed by @Akinsuyiphilip as part of the Stellar Wave Program's 8th Wave 🥳

😎 @Akinsuyiphilip: You earned 200 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here. You can also Leave a review to share your experience working on this issue.

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