Description

Fix the check unit tests workflow syntax so that the appropriate TEST_DB_URI environment variables are set before tests are executed.

Additional Notes

• update to local_server.sh to allow for an optional WORKERS argument (useful for testing tuning where we want more than 1 thread)
• created a new get_random_function method in databases to abstract how we build random selections into our tuning queries
• fixed a type check issue with schemas.PassRecommendation

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Checklist

Please review and complete the following checklist before submitting your pull request:

• I have ensured that the pull request is of a manageable size, allowing it to be reviewed within a single session.
• I have reviewed my changes to ensure they are clear, concise, and well-documented.
• I have updated the documentation, if applicable.
• I have added or updated test cases to cover my changes, if applicable.
• I have minimized the number of reviewers to include only those essential for the review.

Checklist for Reviewers

Please review and complete the following checklist during the review process:

• The code follows best practices and conventions.
• The changes implement the desired functionality or fix the reported issue.
• The tests cover the new changes and pass successfully.
• Any potential edge cases or error scenarios have been considered.