Fix Stage-Funnel Report Exports with Hidden Numbers

report.generate and report.synchronous now honor the "Hide Numbers" setting on stage-funnel reports. The last column ("Percent of Stage") contains decimal percentages between 0 and 1 instead of raw integer counts, and summary rollup rows are excluded from the response.
For reports rendered as a passthrough chart, the exported percentage is the stage-to-stage passthrough rate. For reports rendered as a table, the exported percentage is the share of the parent group at that stage.