Add SSH private key to sshkey.txt

[okerescm]

Added a new SSH private key to the repository.

Description

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Related Issues

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Motivation and Context

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How Has This Been Tested?

• Tested endpoints using Postman/Thunder Client
• Verified database queries
• Checked response format

Screenshots (if appropriate)

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Types of Changes

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that may cause existing functionality to change)

Checklist

• My code follows the project's code style
• My change requires documentation updates
• I have updated the documentation accordingly
• I have added tests to cover my changes
• All new and existing tests pass
• I have run the code locally and verified that it works