fix: add api_version breadcrumb to client docs

[noahdietz]

Adds simple breadcrumb comment to client class commentary including the google.api.api_version value that this client was generated based on and sends in its requests, as per AIP-4236. This breadcrumb will allow client users to reference the API version used by the client in other API artifacts e.g. product documentation.

Fixes internal tracking bug http://b/467138606, child of http://b/467065424.

[gemini-code-assist]

Summary of Changes

Hello @noahdietz, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a significant enhancement to the generated client documentation by embedding the google.api.api_version directly into the client class commentary. This "breadcrumb" comment provides immediate visibility into the API version a client was generated against and uses in its requests, thereby improving traceability and alignment with AIP-4236 for better product documentation and user understanding.

Highlights

• API Version Breadcrumb: Adds the google.api.api_version as a breadcrumb comment directly into the client class documentation.
• AIP-4236 Compliance: Implements this documentation enhancement in accordance with the guidelines of AIP-4236.
• Improved Referencing: Enables client users to easily reference the specific API version used by the client in other product documentation or artifacts.
• Internal Bug Fix: Addresses and fixes internal tracking bugs http://b/467138606 and http://b/467065424.

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[gemini-code-assist]

Code Review

This pull request adds an API version breadcrumb to the generated client documentation, as specified by AIP-4236. The implementation correctly appends the version information to the service description. However, I've identified a couple of areas for improvement to ensure full compliance with the AIP and to handle edge cases gracefully. My feedback includes a suggestion to correctly format the breadcrumb when the API short name is missing, and another to ensure the breadcrumb is always included when an API version is present, regardless of whether a service description exists.

[blakeli0]

Thanks Noah!

[noahdietz]

Thanks Noah!

You're welcome, thanks for the quick review!

[noahdietz]

@blakeli0 I assume I can ignore the two failing presubmits?

[blakeli0]

@blakeli0 I assume I can ignore the two failing presubmits?

Yes, those are fine. FYI, we are in the middle of testing RCs, we'll merge this PR once the testing are done.

[noahdietz]

Yes, those are fine. FYI, we are in the middle of testing RCs, we'll merge this PR once the testing are done.

Ok great thanks for letting me know! I do have the power to push the button it seems so I wasn't sure if I should do it myself or not. I will leave it to you!

Cheers.