is working. Next up:
- isolate the test_server failing tests
- move the settings mock into a conftest fixture
- add a test hook for SyncServer so you can do the
same thing there.
- propigate.

for default persona, human, and preset. Now all
derived from settings (which is in turn derived
from envars). Still need to square away with the
config file hierarchy, so once we resolve the value
there is only one definitive source of truth across
the rest of the code.