0.15.0 Rebase

[NickGeneva]

Earth2Studio Pull Request

Description

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.
• The CHANGELOG.md is up to date with these changes.
• An issue is linked to this pull request.
• Assess and address Greptile feedback (AI code review bot for guidance; use discretion, addressing all feedback is not required).

Dependencies

[greptile-apps]

Greptile Summary

This PR finalizes the 0.15.0 release by filling in the release date in CHANGELOG.md, updating the README "Latest News" section to highlight new 0.15.0 features, and adding a 0.15.0 entry to the documentation version switcher.

• CHANGELOG.md: Release date updated from placeholder 2026-05-xx to 2026-05-25.
• README.md: "Latest News" note bumped to reference 0.15.0 and bullet list replaced with the four new 0.15.0 features (Himawari AHI, GHCN-Daily, Orbit-2, Conventional Observation Sources).
• docs/_static/switcher.json: New versioned entry added pointing to https://nvidia.github.io/earth2studio/v/0.15.0/.

Confidence Score: 5/5

All three files are documentation/metadata only — no executable code is touched.

The changes are limited to filling in a release date, refreshing a README news blurb, and inserting a version entry in the docs switcher. All edits are straightforward and consistent with a standard release preparation workflow.

No files require special attention.

Important Files Changed

Filename	Overview
CHANGELOG.md	Release date filled in for 0.15.0 (2026-05-25)
README.md	Latest News section updated from 0.14.0 features to 0.15.0 features (Himawari AHI, GHCN-Daily, Orbit-2, Conventional Observation Sources)
docs/_static/switcher.json	0.15.0 version entry added to the documentation version switcher

_{Reviews (1): Last reviewed commit: "Update version to 0.16.0a0" | Re-trigger Greptile}