CI: Verify compatibility with Grafana 12.4.0

[amotl]

Grafana 12.4.0 was released on 2026-02-24, and includes a few breaking changes by removing API endpoints that have previously been flagged for deprecation.

• https://grafana.com/docs/grafana/latest/whatsnew/whats-new-in-v12-4/
• https://github.com/grafana/grafana/blob/main/CHANGELOG.md#1240-2026-02-24

[coderabbitai]

Caution

Review failed

The pull request is closed.

ℹ️ Recent review info

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between ffa5011 and fdbeb1d.

📒 Files selected for processing (1)

• .github/workflows/tests.yml

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Walkthrough

Updated Grafana version in the main CI test matrix from 12.3.2 to 12.4.0, un-commented the include section, and added a new test configuration for Grafana 12.3.4 with Python 3.14, Mosquitto 2.0, and InfluxDB 1.8 on Ubuntu 22.04.

Changes

Cohort / File(s)	Summary
GitHub Actions Workflow Configuration .github/workflows/tests.yml	Updated Grafana version in main matrix (12.3.2 → 12.4.0), un-commented include section, and added new matrix entry for Grafana 12.3.4 with Python 3.14, Mosquitto 2.0, InfluxDB 1.8, Ubuntu 22.04.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~5 minutes

Possibly related PRs

• CI: Don't expand test matrix along the Grafana axis #189: Also modifies .github/workflows/tests.yml to adjust how Grafana versions are configured in the CI test matrix using include blocks.

Poem

🐰 A bump in the matrix, versions align,
Grafana versions 12.3, 12.4 in line,
Python and Mosquitto dance through the tests,
The CI pipeline hops toward its best! ✨

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch grafana-update-2026-02

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.53%. Comparing base (ffa5011) to head (fdbeb1d).
⚠️ Report is 22 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #247   +/-   ##
=======================================
  Coverage   78.53%   78.53%           
=======================================
  Files          56       56           
  Lines        3024     3024           
=======================================
  Hits         2375     2375           
  Misses        649      649           

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