New optional linear flag added to flow templates (settable on POST/PUT /v2/flows/templates); when true, task enablement is computed at runtime from the flow graph — a task becomes enabled once all its direct predecessors are complete — overriding any explicit per-task requirements
New optional linear flag added to flow executions (copied from the flow template when the execution starts); when true, task enablement is computed at runtime from the flow graph — a task becomes enabled once all its direct predecessors are complete — instead of from each task's explicit requirements