Add CI check for test duration impact

[mtrezza]

New Feature / Enhancement Checklist

• I am not disclosing a vulnerability.
• I am not just asking a question.
• I have searched through existing issues.

Current Limitation

Currently, a PR may add poorly written tests that prolong the CI test duration, for example by reconfiguring the server unnecessarily often or using async timeout.

Feature / Enhancement Description

Add CI check to evaluate test duration impact.

Example Use Case

n/a

Alternatives / Workarounds

Manual observation.

3rd Party References

n/a