Standardize API response format across all endpoints

[nanaf6203-bit]

Problem

API endpoints return inconsistent response formats: some return raw Prisma objects, some have { data, meta }, some just { message }. No standardized envelope format.

Expected Outcome

Every API response follows the same structure.

Acceptance Criteria

• Response interceptor wraps all successful responses
• Standard envelope: { success, data, meta, timestamp }
• Standard error format
• Pagination meta: { page, limit, total, totalPages }

Files Affected

New: src/common/interceptors/response-format.interceptor.ts, all controllers

Difficulty

Medium

Estimated Effort

Medium (1 week)

Labels

api, refactoring, enhancement

[nafiuishaaq]

@nafiuishaaq has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hello maintainer, i can take care of this within 2 hours once assigned. Thank you.

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

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[drips-wave]

This issue has been completed by @nafiuishaaq as part of the Stellar Wave Program's 7th Wave 🥳

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