fix: fix assignment control

[bchrobot]

Description

Fix bug in Assignment Control.

This also fixes an error dialog produced when saving changes that only include escalation tag changes.

Motivation and Context

#1027 introduced an ID GraphQL type mismatch.

How Has This Been Tested?

This has been tested locally and on the instance originally reporting the bug.

Screenshots (if appropriate):

N/A

Types of changes

• 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)

Documentation Changes

N/A

Checklist:

• My code follows the code style of this project.
• My commit messages follow the Conventional Commits specification.
• My change requires a change to the documentation.
• I have included updates for the documentation accordingly.

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