Added __str__ and __repr__ methods to WorkflowMonitor; small updates to same methods in WorkflowEvent

Changed import statements to break local testing but fix automatic conda build testing. I'm not sure how to resolve the different import needs.

SSA-6324: refactored prop setter for testability and created tests; added script to run all tests in data repo

SSA-6324: Tests are tightened up and more efficient; pylint is (somewhat) mollified; optimizing them flushed out a bug or two in the updater.

SSA-6324: datafetcher tests proceed as expected in IJ and at command line, but not in Docker container. scode_updater tests proceed as expected in IJ, but not at the command line or in Docker container. Requirements updated; convenience script added for rebuilds.

SSA-6324: schema init adds convenience methods suggested by Thomas; Project how has authors cascade; deploy requires Python 3.8; a project updater test now requires pytest-mock; updater and datafetcher tests complete, and most exercise CLI