test(sdk): add full coverage for all CraftClient public methods #499

[dot-enny]

Closes #499

Summary of Actions Taken:

1. Branch Management: Created the branch issue-025-sdk-client-full-method-coverage as required.
2. Supplemental Testing: Augmented [client.test.ts] to include precise assertions targeting non-2xx responses.
3. Execution Edge Cases addressed:
   • Simulated robust status codes (401, 404, 500) against individual requests mapped directly across getSubscription, cancelSubscription, and getDeploymentHealth.
   • Covered validation against the edge case where setAccessToken() was neglected before reaching downstream procedures.
4. All 39 automated specs pass effortlessly.

[drips-wave]

@dot-enny Great news! 🎉 Based on an automated assessment of this PR, the linked Wave issue(s) no longer count against your application limits.

You can now already apply to more issues while waiting for a review of this PR. Keep up the great work! 🚀

Learn more about application limits