implement update script that can be run locally and in CI, to fulfill steps 1-7 of the workflow defined in [the design doc](https://microsoft.sharepoint.com/:fl:/g/contentstorage/x8FNO-xtskuCRX2_fMTHLXnhuDkjtmlFgmSXOpdIe1M/IQDn78uwePyrTZKzoXToBzzOAd--yJqkp7Wk8xvs0_V-YwM?e=UEkwgk&nav=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%3D%3D)