Upgrade Prisma Client to 5.6 - Resolves Unit Filter Bug

[mgmgperson]

Description

Quick upgrade to Prisma Client from its 4.12 to 5.6. Addresses the bug where the unit count filter was broken.
May need to regenerate database with "npm run db-generate".

Closes #124

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

• Test A
• Test B

Test Configuration:

• Node.js version:
• Python version:
• Desktop/Mobile:
• OS:
• Browser:

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[Lhwhatever]

lgtm