Why this matters

The repo has several test entry points. New contributors need a fast answer to "which command should I run first?"

Files to touch

• tests/README.md

Exactly what to do

1. Add a small table with three columns: Goal, Command, When to use it.
2. Include at least make test-cov, make verify-integrations, and make test-rca.
3. Keep each explanation to one short line.
4. Do not rewrite the rest of the file.

Done when

• The table is present and easy to scan
• All commands already exist in the repo