progress on dashboard definition modeling

..._tooling/transformation/superset/definitions/dashboard.py

mitm_tooling/utilities/python_utils.py

test/asset_export_samples/Event_Annotations_199.yaml

test/asset_export_samples/Event_Type_Counts_202.yaml

test/asset_export_samples/Event_Type_Counts_205.yaml

test/asset_export_samples/Events_per_Object_203.yaml

test/asset_export_samples/MAED_Testing_12.yaml

test/asset_export_samples/Measurement_Type_Counts_204.yaml

test/asset_export_samples/Objects_201.yaml

test/asset_export_samples/Segment_Annotations_200.yaml

test/asset_export_samples/TS_Plot_198.yaml

test/asset_export_samples/metadata.yaml

test/asset_export_samples/query_context_count_ts.yaml

test/asset_export_samples/query_context_pie.yaml

test/asset_export_samples/query_context_ts.yaml

test/asset_export_samples/query_context_ts_bar.yaml