[BE-15] Implement Department entity and DepartmentsModule

[yusuftomilola]

Overview

Create the Department entity and wire up the DepartmentsModule with its service inside backend/contrib/.

Location

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

Acceptance Criteria

• Department entity with fields: id (UUID), name (unique), description (nullable), createdAt, updatedAt
• DepartmentsService with: findAll(), findOne(id), create(dto), remove(id)
• DepartmentsModule exports DepartmentsService for use in AssetsModule
• Entity registered with TypeORM

[tolulopedd26]

@tolulopedd26 has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

can i work on this?

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[drips-wave]

Congratulations, @tolulopedd26! 🎉 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 @tolulopedd26 as part of the Stellar Wave Program's 4th Wave 🥳

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