Add ci and tests

[pip-install-godofcoding]

Description

This Pull Request introduces a baseline Continuous Integration (CI) pipeline and baseline unit tests for the project.

Key changes:

1. Quality Automation: Added a workflow to automatically run tests on every push, ensuring code reliability.
2. Standardized Testing: Implemented initial test cases to verify core API endpoint functionality and schema validation.
3. Environment Hardening: Configured mocking to ensure tests execute cleanly in a standardized CI environment without requiring external dependencies.

Motivation and Context

These changes provide a sustainable foundation for future development, ensuring that contributions maintain a consistent level of quality through automated verification.

How Has This Been Tested?

• Verified with internal test runner.
• All baseline tests are passing.