unbreak backend-test by bumping the ee ref past a test arity break (#10987)

* fix: bump the ee ref past the seats_consumed test arity break

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01VwxTTC4GsAANBjEZki2cft

* chore: update ee-repo-ref to fb1c5c109846d6c47aff70ab6cc631f4fd773678

This commit updates the EE repository reference after PR #781 was merged in windmill-ee-private.

Previous ee-repo-ref: d197b7b1c76e2aa7cde6cef2e2d9556607cce4c6

New ee-repo-ref: fb1c5c109846d6c47aff70ab6cc631f4fd773678

Automated by sync-ee-ref workflow.

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Co-authored-by: Claude Opus 5 (1M context) <noreply@anthropic.com>
Co-authored-by: windmill-internal-app[bot] <windmill-internal-app[bot]@users.noreply.github.com>