Search VX workflows

[knollengewaechs]

Steps to test:

• Make sure you have a few vx workers and that vx is connected to webknossos
• go to administration > voxelytics and search for workflow name or hash

Issues:

• fixes #7730

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(Please delete unneeded items, merge only when none are left open)

• [x] Updated changelog
• [ ] Removed dev-only changes like prints and application.conf edits
• [ ] Considered common edge cases