[BE-33] Implement Excel and PDF export endpoints in Reports module

[yusuftomilola]

Overview

Implement Excel and PDF export endpoints in the Reports module inside backend/contrib/.

Location

All work must be inside backend/contrib/src/reports/.

Acceptance Criteria

• GET /reports/export/excel — generates .xlsx using exceljs with all assets in a formatted table; returns with Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet and Content-Disposition: attachment; filename=assets-report.xlsx
• GET /reports/export/pdf — generates PDF using pdfkit with a title, date, and asset table; returns with Content-Type: application/pdf
• Excel columns: Asset ID, Name, Category, Department, Status, Condition, Purchase Price, Location, Created Date
• PDF mirrors same columns in a readable layout
• Both endpoints protected by JwtAuthGuard

[Joe8175]

@Joe8175 has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

Hi please assign me just this task

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Joe8175 to this issue.

[barry01-hash]

@barry01-hash has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

Please assign the issue to me boss 🙏🙏

ℹ️ Repo Maintainers: To accept this application, review their application or assign @barry01-hash to this issue.

[sasasamaes]

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

Full Stack developer with 6+ years of experience involved in the full software development lifecycle. My experience includes providing IT solutions for enterprises using JavaScript, React, TypeScript, Node.js,Smart Contract, Solidity, Rust,Cairo, Postgresql and MongoDB.

I am also a community leader and sensei at Dev.f, where I mentor and lead a vibrant community of developers

My areas of interest include Web3,Smart Contracts, frontend, backend, and full-stack development.

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

[MooreTheAnalyst]

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

Hello, i would like to be assigned to work on this issue
I’ve reviewed the requirements and have a clear path forward for the implementation. I estimate I can have a PR ready within a short time of being assigned. Could you please assign this to me?

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

[RUKAYAT-CODER]

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

Hi am a full stack developer, i will like to work on this task

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

[drips-wave]

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

🧑‍💻 @RUKAYAT-CODER: 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 🌊

[drips-wave]

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

😎 @RUKAYAT-CODER: 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.

🧑‍💻 Repo maintainers: How'd the contributor do? Leave a review to share your experience working with them.