Roman-datamodels

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- Removed CRDS version information from basic maker utility. [80]

- Updated utilities and test for change in dimensionality of err variable in ramp datamodel. [82]

- Add support for new ``rad`` schema tags. [86, 90]

- Removed keywords from guidestar. [88]

- Fixed format of exposure times factory functions, changed filter 'W146' to 'F146'. [87]

- Update create_ref_file() to match updated schema. [89]

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- Added function for model equality. [79]

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- Removed ``observation.date`` and ``observation.time`` from CRDS parameters. [78]

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- Setup the initial infrastructure and basic files for documenting the roman_datamodels package [67]

- Fix bug with asdf.fits_embed. [69]

- Added distortion data model, utilities, and tests. [70]

- Removed exptype and p_keyword from Distortion maker utility and factory. [71]

- Updated photom maker utilities and tests. [72]

- Corrected photom units to megajanskies. [73]

- Moved ma_table_name and ma_table_number from observation to exposure groups. [74]

- Update astropy min version pin to 5.0.4. [75]

- Add utilities for ``ref_file``. [76]

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- Updated maker utility and factory for dark ref model to include group keywords from exposure. [66]

- Updated maker utilities for level 1, level 2, and ramp models to reflect changes in reference pixels. [65]

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- Updated rampfit and flat maker utilities to support the same functionality as the other model maker functions. Streamlined and commented all maker utility functions. Added tests to complete coverage of roman_datamodels/testing/utils.py. Cleaned out some deprecated code. [59]

- Updated stnode tests to include all cal steps. [60]

- Fix bug with asdf 2.9.x due to change in private variable name. [63]