MAT-10156: Add transient ownerDisplayName to CqlLibrary model

[etan-sb]

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Add a non-persisted (@transient) ownerDisplayName field to CqlLibrary so the /versioned endpoint in measure-service can carry a resolved owner display name in its JSON response.

Jira Ticket: MAT-10156
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• This PR has the JIRA linked.
• Required tests are included.
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• This PR has NO significant security impact (i.e Changing auth methods, Adding a new user type, Adding a required but vulnerable package).

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