feat: add Department model

[devin-ai-integration]

Summary

Adds a Department Sequelize model (backend/src/models/department.js) following the same pattern as user.js:

• UUID primary key (UUIDV4 default)
• name — required, notEmpty validator
• description — optional (allowNull: true)
• status — ENUM('active', 'inactive'), defaults to 'active'
• timestamps: true

Registered in models/index.js alongside User. Includes a full test suite (department.model.test.js, 17 tests, 100% coverage).

Link to Devin session: https://app.devin.ai/sessions/b08d56b5cecf4545a99acb077c5d872d
Requested by: @0xpritam

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Summary by CodeRabbit

Release Notes

• New Features

  • Backend infrastructure to support department management capabilities has been added.

• Tests

  • Added comprehensive test suite for department functionality.

[devin-ai-integration]

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No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: defaults

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Run ID: cace6d95-1224-4b05-ac09-17cc0d93d2f5

📥 Commits

Reviewing files that changed from the base of the PR and between c99de79 and e4a5fc0.

📒 Files selected for processing (3)

• backend/src/__tests__/department.model.test.js
• backend/src/models/department.js
• backend/src/models/index.js

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📝 Walkthrough

Walkthrough

This pull request adds a Department model to the backend Sequelize schema. The Department model includes a UUID primary key, required name field with validation, optional description, and a status field restricted to active/inactive states. The model is then integrated into the main models export alongside the existing User model.

Changes

Department Model

Layer / File(s)	Summary
Department model definition and tests backend/src/models/department.js, backend/src/__tests__/department.model.test.js	Department model factory defines UUID id primary key with default, required name with notEmpty validator, optional description STRING, status ENUM with active/inactive values and active default, and timestamps enabled. Jest tests verify factory function export, model class return, table/model naming, and all attribute types, constraints, validators, and enum configurations.
Model wiring and exports backend/src/models/index.js	Models index is updated to require and export the new Department factory, and User import path is standardized from './User' to './user'.

🎯 2 (Simple) | ⏱️ ~8 minutes

🐰 A department awaits, with timestamps so true,
UUID keys shining, both active and new,
Status enums dancing 'tween states bright,
Sequelize stitches them all up just right!

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'feat: add Department model' directly and clearly describes the main change: adding a new Sequelize Department model. It matches the primary objective and is specific and concise.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

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🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch devin/1780590928-add-department-model

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[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

View in Devin Review to see 3 additional findings.