I have been working on an ETL process to push / upsert my data from PostgreSQL into ArcGIS Online into a lines feature layer to be included on a WebMap. I have had no problem with using essentially this exact format/code with a points layer. I read in one forum post the gis.content.analyze method will only work with points…but the post is alluding me now that I want to reference it, of course (it was not official from ESRI).