Ingested reports should be marked as ammended/ammendedments

[poffdeluxe]

If a report is an amendment, we should have a standardized way to record that. We should also probably figure out a way to mark if a report is "the report of record."

Example: If I want to calculate total contributions and total expenditures via reports, I would want to retrieve reports that provide the most updated info while ignoring reports that have been replaced by amended reports (to avoid double counting of numbers)

Report system is being introduced via: #7