Invalidate latest version cache when new schema version is registered

[jsingh-yelp]

What

Currently when a new schema version is registered, the client library's latestVersionCache isn't invalidated, causing it to serve a stale version.

This change invalidates the latest version cache whenever a new schema version is registered.

Checklist

Please answer the questions with Y, N or N/A if not applicable.

• [N] Contains customer facing changes? Including API/behavior changes
• [N] Is this change gated behind config(s)?
  • List the config(s) needed to be set to enable this change
• [Y] Did you add sufficient unit test and/or integration test coverage for this PR?
  • If not, please explain why it is not required
• [N] Does this change require modifying existing system tests or adding new system tests?
  • If so, include tracking information for the system test changes
• [N] Must this be released together with other change(s), either in this repo or another one?
  • If so, please include the link(s) to the changes that must be released together

References

Issue link: #4021

Test & Review

Added tests for this change.

[confluent-cla-assistant]

🎉 All Contributor License Agreements have been signed. Ready to merge.
✅ jsingh-yelp
_{Please push an empty commit if you would like to re-run the checks to verify CLA status for all contributors.}

[rayokota]

/sem-approve

[Copilot]

Pull Request Overview

This PR fixes a caching bug where the latest schema version cache was not being invalidated after registering a new schema version, causing subsequent calls to retrieve stale cached data.

• Adds cache invalidation logic when a new schema is successfully registered
• Adds comprehensive test coverage to verify cache invalidation behavior

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
CachedSchemaRegistryClient.java	Invalidates latest version caches after successful schema registration
CachedSchemaRegistryClientTest.java	Adds test to verify latest version cache is properly invalidated on registration

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull Request Overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[rayokota]

/sem-approve

[jsingh-yelp]

@rayokota Can I please have a review on this? Not sure if the command "/sem-approve" is working as expected.

[jsingh-yelp]

cc: @rayokota can I please get a review on this PR?

[rayokota]

@jsingh-yelp , can you update the branch to the latest?

[jsingh-yelp]

@rayokota done