GHSA-5h9v-837x-m97r: FlowiseAI: Dataset create+update mass-assignment allows cross-workspace dataset takeover

FlowiseAI has a mass assignment vulnerability (a flaw where client input is copied directly into database objects without filtering) in its Dataset feature that lets authenticated users move datasets between workspaces by including a fake `workspaceId` field in their request. This breaks workspace isolation (the boundary that keeps each workspace's data separate) and allows attackers to steal or modify datasets belonging to other workspaces.