Niondata

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- Make Calibration hashable.
- Require Numpy 2. Add Python 3.13 support. Drop Python 3.9, 3.10 support.

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- Restore RPC (remote procedure calls) support to DataAndMetadata.

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- Add power function (xdata.power).
- Add radial profile function (xdata.radial_profile).
- Improve handing of invalid inverse coordinates (1/0).
- Add support for computing the phase of a complex array (thanks Luc J Bourhis).
- Improve performance (eliminate some unnecessary metadata dict copying)

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- Minor update for typing compatibility.

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- Reapply DataMetadata read-only accessors change.
- Make read-only accessors to all DataMetadata properties instead of having them be read/write.

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- Revert breaking change: DataMetadata read-only accessors.