added compute challenge type

[ArnabChatterjee20k]

No description provided.

[greptile-apps]

Greptile Summary

Adds a validated compute challenge type and updates rule tests to cover the new type and rejection of unknown types.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failures remain.

Important Files Changed

Filename	Overview
src/Rules/Challenge.php	Adds TYPE_COMPUTE to the challenge type allowlist.
tests/RulesTest.php	Correctly verifies compute-type round-tripping and unknown-type rejection.

_{Reviews (2): Last reviewed commit: "updated" | Re-trigger Greptile}