fix: Add missing ScalingGroupForProjectRow to with_tables fixture

The associate/disassociate user group tests were failing because the
sgroups_for_groups table was not being created in the test database.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <[email protected]>

Author: jopemachine

tests/unit/manager/repositories/scaling_group/test_scaling_group_repository.py

@@ -90,6 +90,7 @@ async def db_with_cleanup(
                 UserRow,
                 KeyPairRow,
                 GroupRow,
+                ScalingGroupForProjectRow,  # depends on ScalingGroupRow and GroupRow
                 ImageRow,
                 VFolderRow,
                 EndpointRow,