Consolidate duplicate DTO files across modules

[nanaf6203-bit]

Problem

Modules have inconsistent DTO organization. For example, transactions has transaction.dto.ts and transactions.dto.ts. Some modules have many DTO files, others consolidate.

Expected Outcome

Clear, consistent DTO organization across all modules.

Acceptance Criteria

• Decide on naming convention (entity-based or use-case-based)
• Consolidate duplicate files
• All imports updated
• Swagger decorators preserved

Files Affected

src/transactions/dto/, all DTO directories

Difficulty

Easy

Estimated Effort

Small (2-3 hours)

Labels

refactoring, tech-debt

[Silver36-ship-it]

@Silver36-ship-it has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I would love to work on this professionally, please assign it to me

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[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.

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

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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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