The flusurv-fetching function doesn't [request all fields](https://github.com/cmu-delphi/epidatr/blob/d422f56c3eac67956f87b4477233e732abe3e04b/R/endpoints.R#L997-L1007) currently available in our flusurv table. Make sure we fetch [all of these columns](https://github.com/cmu-delphi/delphi-epidata/blob/f7da6598a810be8df5374e3a71512c631c3a14f1/src/acquisition/flusurv/flusurv_update.py#L116-L118), and later include the columns added in https://github.com/cmu-delphi/delphi-epidata/pull/1278