Render resolves template expressions in the given string.
Uses Go's text/template syntax: {{.TaskName}}, {{.Vars.myvar}}.
Returns the input unchanged if it contains no template delimiters.
type Context struct {
// System variables JobID string TaskName string Iteration int Attempt int Timestamp string// User-defined variables (from inputs section or CSV) Vars map[string]string
}
Context holds all variables available for template resolution.