Add unit tests for annotations endpoint #267

[Subomiadekunle]

Summary

Adds unit tests for the GET /api/annotations/:boneId endpoint.

Changes

• Tests successful annotation retrieval for a valid boneId
• Verifies the expected response properties and annotation data type
• Tests invalid boneId input and 400 responses
• Tests non-existent boneId data and 404 responses
• Tests the 100-character boneId validation limit

Testing

• npm test - 16 tests passed
• npm run lint - passed

Closes #267

[mudabs]

Great job, tests passed!