Schwab export file auto detection

[vbmisc]

FIrst of all, thank you for this brokerage export conversion app for Ghostfolio! I installed mine on OMV's Docker Compose and it runs and sees the input file I exported from my Schwab account. A couple of things I'm seeing is 1) all the dates in the JSON extract show "Invalid date" yet the CSV from Schwab has dates in them and 2) when a Roth conversion occurs and the stocks are transferred to the IRA account, the CSV labels those as "Journaled Shares" along with the number of shares transferred and the price that day which the export is ignoring. I'm also noticing that not all records are converted but I'm looking over the code against the CSV to see what's making it bypass certain rows. I thought I'd better start in the Discussion area to see if I'm messing something up rather than it being an issue :-) Thank you!