Drop the 1.75 GB us4us recording; it lives in zeahub/us4us and no test uses it

Add a small data-only us4us fixture for the separate-metadata path

Drop the us4us fixtures from the repo root (moved to us4us/)

Group the us4us converter fixtures under us4us/

Upload zea_us4us_converted_test_metadata.pkl

Upload data_2024-03-01_17-27-07.pkl

Delete data_2024-07-03_12-51-42.pkl

Upload data_2024-07-03_12-51-42.pkl

Upload zea_us4us_converter_test_data.pkl

Upload zea_us4us_converter_test_data.pkl

Upload verasonics_conversion_test_zea.mat

initial commit