feat: upgrade to superset 6.0.0

[Ian2012]

Testing the upgrade to superset 6.0.0

Screenshots

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[Ian2012]

@mphilbrick211 I've already signed. Can you verify it?

[saraburns1]

@Ian2012 - i just tested exporting dashboards from v6 Superset and importing them using tutor aspects import_superset_zip and got this error

[saraburns1]

it also added duplicates of the datasets with part of the UUID in the filename

[Ian2012]

Can you share the dashboard compressed file?

[saraburns1]

dashboard_export_20260312T184956.zip