v0.9.0 - Fixed official aggregation script + some fixes

[0.9.0] - 2024-10-21

Changed

• The calculate_matched_gsd_performance_metrics function now always return the error metrics that depend on TN
  samples, not just when TN samples exist.
  This way the output structure is consistent, and we can avoid bugs in scorer functions, where some datapoints might
  unexpectedly return a different set of error metrics.
• The official script to aggregate DMOs, now correctly converts stride length values to cm and variance values to cm^2.
  Note, that the internal function within mobgap, does not do this conversion automatically, as we use different units
  in mobgap internally. If you need to match the official script, you have to do this conversion manually.
  see examples/aggregation/_99_cvs_agg_pipeline_no_exc.py.

Fixed

• The zero division hint for error functions did not properly replace the value with NaN, when the result of the
  operation was -inf instead of inf.