MAT-7897: Adding uniqueness check for name and library

[gregory-akins]

CQL to ELM Translation Service PR

Jira Ticket: MAT-7897
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Summary

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• This PR has the JIRA linked.
• Required tests are included.
• No extemporaneous files are included (i.e Complied files or testing results).
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• Any breaking changes or failing automations are noted by placing a comment on this PR.

DevSecOps

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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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• Code is maintainable and reusable, reuses existing code and infrastructure where appropriate, and accomplishes the task’s purpose.
• The tests appropriately test the new code, including edge cases.
• If you have any concerns they are brought up either to the developer assigned, security engineer, or leads.