Renders a workflow diagram as a Base64-encoded inline image using ObjWorkflowVisual.
IMAGEWORKFLOW — set as ReportType in def_report.
def Render(self, Param1: str = "", Param2: str = "", Param3: str = "") -> str:
Param1 is the workflow code to visualise. The workflow diagram is generated by ObjWorkflowVisual.WorkflowVisual.visualise_piper, which returns a filename. That file is read and embedded as a Base64-encoded <img> tag. Returns an HTML string.
Requires ObjWorkflowVisual from factory.core. The generated image file must exist after visualise_piper returns; the report does not handle the case where generation fails.