Bump prime CLI to 0.5.42

[JannikSt]

• add cluster_name param to RL run creation (admin-only)

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Note

Low Risk
Simple version constant update with no functional logic changes; impact limited to version display and User-Agent metadata.

Overview
Bumps the Prime CLI package version from 0.5.40 to 0.5.42 by updating prime_cli.__version__, affecting version reporting and the default User-Agent string.

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