Reduce Author API fields and extend User and Viewer API fields.

openlobby/core/api/types.py

tests/dummy.py

tests/schema/snapshots/snap_test_authors.py

tests/schema/snapshots/snap_test_node.py

tests/schema/snapshots/snap_test_search_reports.py

tests/schema/snapshots/snap_test_viewer.py

tests/schema/test_authors.py

tests/schema/test_node.py

tests/schema/test_viewer.py