Renders an Apache ECharts box-plot chart showing statistical distribution across categories.
ECHARTSBOXPLOT — set as ReportType in def_report.
def Render(self, Param1="", Param2="", Param3="") -> str:
Inherited from ObjReportEchartsbase. Param1, Param2, and Param3 are forwarded in the RPC payload for SQL token substitution. Returns an HTML string containing a styled panel and an ECharts initialisation script.
Uses the Apache ECharts JS library. The SQL query must return rows where column 0 is the category label and columns 1–5 are the five boxplot statistics (min, Q1, median, Q3, max). Option building is handled by ObjReportEchartsbase._build_boxplot_option.