docs(release): update changelog for the 2026-02 release

[scotthart]

This change is 

[gemini-code-assist]

Summary of Changes

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This pull request finalizes the v2.47.0 release by updating the official release date in the changelog and incorporating the latest features and bug fixes for the Spanner and Storage clients. It also removes the 'release candidate' designation from the project's versioning metadata, signifying that this version is now considered stable.

Highlights

• Release Date Update: The CHANGELOG.md has been updated to set the release date for v2.47.0 to 2026-02.
• Changelog Entries: New features and fixes for Spanner and Storage services, along with an update to Google APIs interface definitions, have been added to the v2.47.0 changelog section.
• Version Finalization: The 'rc' (release candidate) suffix has been removed from the project version across CMakeLists.txt, MODULE.bazel, and google/cloud/internal/version_info.h, indicating the transition to a stable release.

Changelog

• CHANGELOG.md
  • Updated the release date for v2.47.0 from 'TBD' to '2026-02'.
  • Added a new entry for Spanner, defining the IsolationLevel enum for transactions.
  • Added several updates for Storage, including taking the async client out of experimental, adding extra validation for object metadata, updating the write handle for appendable object uploads, and introducing a flag for multi-stream feature enablement.
  • Included a fix for gRPC misuse in Storage that caused crashes due to concurrent writes.
  • Updated the reference for Google APIs interface definitions to 2026-01-30T21:16:31-08:00.
• CMakeLists.txt
  • Removed the 'rc' pre-release identifier from the PROJECT_VERSION_PRE_RELEASE variable.
• MODULE.bazel
  • Updated the module version from 2.47.0-rc to 2.47.0.
• google/cloud/internal/version_info.h
  • Removed the 'rc' pre-release identifier from the GOOGLE_CLOUD_CPP_VERSION_PRE_RELEASE macro.

Activity

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[scotthart]

/gcbrun