Automatically update data and await approval from human

[jbothma]

• daily job to look for new excel file
• benchmark current data vs new file
  • dump stats of current data
  • load file
  • dump stats with new data
• create pull request with benchmark

[jbothma]

Some sanity checking metrics:

• Most pricing changes are within, say, 10%. Some outliers allowed.
• some threshold for expected removals, expected additions, expected changes. Catch a case of e.g. everything being removed or replaced due to a format change or something