docs: add 1.3.0-alpha.1 release note

[WenyXu]

What changed

• Add the GreptimeDB v1.3.0-alpha.1 release note.

Scope

• Documentation versions: 1.3.0-alpha.1
• Languages: English

Verification

• Confirmed the blog post keeps the GitHub alpha-release body, including the # v1.3.0-alpha.1 H1 directly below its frontmatter.

Checklist

• I verified the content against the applicable GreptimeDB version.
• I updated the relevant documentation versions and languages, or explained why not.
• I checked changed links and anchors.
• I updated navigation when the document structure changed.

[cloudflare-workers-and-pages]

Deploying greptime-docs with    Cloudflare Pages

Latest commit:	a3719e1
Status:	✅  Deploy successful!
Preview URL:	https://9dde4c02.greptime-docs.pages.dev
Branch Preview URL:	https://chore-1-3-0-release-note.greptime-docs.pages.dev

View logs

[chatgpt-codex-connector]

Codex Review Summary

This comment shows the latest Codex review activity on this pull request.

Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-04T03:47:35.594749Z	14f343f	Draft marked ready

ℹ️ About Codex in GitHub

Your team has set up Codex to review pull requests in this repo. Reviews are triggered when you

• Open a pull request for review
• Mark a draft as ready
• Comment "@codex review" or "@codex security review".

Codex reacts with 👀 while any review is running, comments if it has suggestions, and reacts with 👍 once all reviews finish with no findings.

[Copilot]

🟢 Approval recommended

The change is an additive release-note blog post that matches existing repo conventions and does not introduce structural or formatting issues.

Pull request overview

Adds a new English release-note blog post for GreptimeDB v1.3.0-alpha.1 under the repository’s existing blog/release-*.md pattern, matching the established frontmatter and “H1 immediately after frontmatter” structure used by prior release posts.

Changes:

• Added blog/release-1-3-0-alpha-1.md with v1.3.0-alpha.1 highlights and the full changelog sections (breaking changes, features, fixes, etc.).
• Included frontmatter (keywords, description, date) consistent with other release blog entries.

File summaries

File	Description
blog/release-1-3-0-alpha-1.md	New v1.3.0-alpha.1 release-note blog post following the repo’s existing release blog format.

Review details

• Files reviewed: 1/1 changed files
• Comments generated: 0
• Review effort level: Lite

---

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.