test: add sample t4 dataset for unit test

[ktro2828]

What

This pull request introduces a comprehensive set of sample annotation files for a minimal T4 dataset, which will be useful for unit testing and development. It also updates the import of Quaternion in the converter module to use the project's own type definition. The most important changes are grouped below:

Dataset Sample Annotation Additions

• Added complete sample annotation files in tests/sample/annotation/ covering attributes, categories, instances, scenes, logs, maps, sensors, calibrated sensors, ego poses, samples, sample data, sample annotations, object annotations, and surface annotations. These files provide a minimal but realistic dataset for unit testing and integration. [1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14]

Codebase Maintenance

• Updated the import for Quaternion in t4_devkit/common/converter.py to use the local type definition from t4_devkit.typing instead of the external pyquaternion library, improving code consistency and maintainability.

[github-actions]

☂️ Python Coverage

current status: ✅

Overall Coverage

Lines	Covered	Coverage	Threshold	Status
2649	2017	76%	50%	🟢

New Files

No new covered files...

Modified Files

File	Coverage	Status
t4_devkit/common/converter.py	100%	🟢
TOTAL	100%	🟢

updated for commit: 5af07cb by action🐍

[Copilot]

Pull Request Overview

This pull request introduces a comprehensive sample T4 dataset for unit testing along with a minor import update. The sample dataset provides a minimal but complete T4 dataset structure with 1 scene, 3 samples, 9 sample data entries, and associated annotations covering all major schema types.

Key changes include:

• Addition of complete sample annotation files covering all T4 schema types (attributes, categories, instances, scenes, logs, maps, sensors, calibrated sensors, ego poses, samples, sample data, sample annotations, object annotations, and surface annotations)
• Comprehensive integration test suite using the real sample dataset to validate end-to-end functionality
• Import update to use local Quaternion type definition instead of external library

Reviewed Changes

Copilot reviewed 19 out of 28 changed files in this pull request and generated 4 comments.

File	Description
tests/test_tier4.py	Comprehensive integration tests using sample T4 dataset for end-to-end validation
tests/sample/status.json	Dataset metadata file with statistics and sensor configuration
tests/sample/annotation/*.json	Complete set of annotation files providing minimal T4 dataset structure
t4_devkit/common/converter.py	Updated Quaternion import to use local type definition

Comments suppressed due to low confidence (2)

tests/sample/annotation/surface_ann.json:1

• These extremely long base64-encoded mask strings make the JSON files difficult to read and maintain. Consider using shorter placeholder masks or storing these in separate binary files for better maintainability of the test data.

[

tests/sample/annotation/surface_ann.json:1

• These extremely long base64-encoded mask strings make the JSON files difficult to read and maintain. Consider using shorter placeholder masks or storing these in separate binary files for better maintainability of the test data.

[

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