docs(upgrade): scope upgrade page to v4.4.0 with plugin dependencies and Important Notes

[SuJinpei]

What

The page is now scoped explicitly to the v4.4.0 upgrade (retitled "Upgrade to v4.4.0", with a link to the patch-version upgrade guide for z-stream upgrades).

The operator-level Upgrade page (docs/en/upgrade.mdx) previously dove straight into the MySQL-PXC migration checklist and never stated the foundational plugin dependencies — unlike the Kafka upgrade doc, which leads with Prerequisites and a plugin/RDS-Framework requirement.

This adds a Prerequisites section before the PXC checklist:

• Plugin Dependencies table with the required upgrade order and minimum versions:

  Order	Plugin	Minimum Version
  1	Data Services Essentials (a.k.a. Application Services Core)	v4.4.0+
  2	Data Services RDS Framework	v4.3.x
  3	Alauda Database Service for MySQL	v4.4.0+
  4	Query Analytics Operator (query-analytics-operator, optional)	v4.4.0+

• Important Notes: upgrade base plugins first, Query Analytics operator version (when used), MySQL-PXC removal is irreversible, operator rollback is not supported.
• Version/component deltas point to the OperatorHub Upgrade prompt (the Release Notes carry no compatibility matrix).

Notes

• The base-plugin version requirements (Essentials >= v4.4.0, RDS Framework v4.3.x, Query Analytics >= v4.4.0) are product requirements; there is currently no compatibility matrix page in the docs to cite. If a matrix is added later, these can link to it.
• Query Analytics is an optional companion (slow query logging / analysis); MySQL-MGR functions normally without it.
• In-page-link targets use explicit \{#id} anchors (doom 1.22.x auto-slug does not reliably match).
• Lint clean on doom 1.12.1 and 1.22.1.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Documentation
  • Updated the upgrade guide for v4.4.0 with a clearer title/intro, a new Prerequisites section (pre-checklist, plugin dependency minimum versions, and required upgrade order), plus warnings including MySQL-PXC removal and other important upgrade constraints.
  • Improved navigation in the upgrade guide by adding an explicit rollback anchor.
  • Revised installation guidance to mark Data Services Essentials (v4.4.0+) and Data Services RDS Framework (v4.3.0+) as required prerequisites before installing the MySQL operator, with a link to full dependency details.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 1b336509-ac43-437d-b13b-968dbcab2eba

📥 Commits

Reviewing files that changed from the base of the PR and between f1b3f4c and dd54864.

📒 Files selected for processing (1)

• docs/en/upgrade.mdx

Walkthrough

The installation and upgrade docs now require Essentials for v4.4.0, add v4.4.0 upgrade prerequisites with plugin version ordering, and mark the rollback considerations heading with an explicit anchor.

Changes

v4.4.0 Documentation Updates

Layer / File(s)	Summary
Installation prerequisite update docs/en/installation.mdx	Replaces the optional installation guidance with required v4.4.0 Essentials and RDS Framework prerequisites and links to the dependency list.
Upgrade prerequisites and rollback anchor docs/en/upgrade.mdx	Renames the upgrade page to v4.4.0, adds the prerequisite checklist, plugin dependency table, important notes, and adds the rollback considerations anchor.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Poem

🐇 Hop, hop, v4.4.0's here,
First check the prereqs, crystal clear.
Install Essentials, then proceed,
Follow the order that you need.
A rollback anchor marks the way,
So links stay tidy every day.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately summarizes the main change: scoping the upgrade docs to v4.4.0 and adding plugin dependency and Important Notes guidance.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch docs/upgrade-plugin-dependencies

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