Covers the 429 rate limi treached exception

[pls78]

Context

Summary

This PR can be summarized in the following changelog entry:

• WIP.

Relevant technical choices:

Test instructions

Test instructions for the acceptance test before the PR gets merged

This PR can be acceptance tested by following these steps:

Relevant test scenarios

• Changes should be tested with the browser console open
• Changes should be tested on different posts/pages/taxonomies/custom post types/custom taxonomies
• Changes should be tested on different editors (Default Block/Gutenberg/Classic/Elementor/other)
• Changes should be tested on different browsers
• Changes should be tested on multisite

Test instructions for QA when the code is in the RC

• QA should use the same steps as above.

QA can test this PR by following these steps:

Impact check

This PR affects the following parts of the plugin, which may require extra testing:

UI changes

• This PR changes the UI in the plugin. I have added the 'UI change' label to this PR.

Other environments

• This PR also affects Shopify. I have added a changelog entry starting with [shopify-seo], added test instructions for Shopify and attached the Shopify label to this PR.

Documentation

• I have written documentation for this change. For example, comments in the Relevant technical choices, comments in the code, documentation on Confluence / shared Google Drive / Yoast developer portal, or other.

Quality assurance

• I have tested this code to the best of my abilities.
• During testing, I had activated all plugins that Yoast SEO provides integrations for.
• I have added unit tests to verify the code works as intended.
• If any part of the code is behind a feature flag, my test instructions also cover cases where the feature flag is switched off.
• I have written this PR in accordance with my team's definition of done.
• I have checked that the base branch is correctly set.

Innovation

• No innovation project is applicable for this PR.
• This PR falls under an innovation project. I have attached the innovation label.
• I have added my hours to the WBSO document.

Fixes #

[coveralls]

Pull Request Test Coverage Report for Build 5d26df208c9765e990e553ee2e202933eaaaf84c

Details

• 2 of 13 (15.38%) changed or added relevant lines in 6 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.01%) to 52.906%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/ai-generator/user-interface/get-suggestions-route.php	0	1	0.0%
packages/js/src/ai-generator/components/suggestion-error.js	0	2	0.0%
src/ai-generator/user-interface/get-usage-route.php	0	2	0.0%
packages/js/src/ai-generator/components/app.js	0	6	0.0%

Files with Coverage Reduction	New Missed Lines	%
packages/js/src/ai-generator/components/suggestion-error.js	1	7.41%

Totals
Change from base Build a205096259a815352792c0e1e9a23c86b6aa218d:	-0.01%
Covered Lines:	31233
Relevant Lines:	59716

---

💛 - Coveralls