only use roman.meta for get_crds_parameters

[braingram]

Closes #367
Closes #366

This PR modifies DataModel.get_crds_parameters to only include (and only access) items under roman.meta. get_crds_parameters is called twice during the setup of commands like the following strun MyStep mydata.asdf. Once to get the pars file for the MyStep and again to prefetch reference files for mydata.asdf. Each of these calls will:

• open the Datamodel contains in mydata.asdf (each call separately opens the file, the opened datamodel is not shared between calls)
• call Datamodel.get_crds_parameters
  With the current implementation of get_crds_parameters, every attribute of the datamodel is accessed and then the attributes are filtered to include select non-array values (see the code for the specific filtering). For a "lazy" file this will result in loading and converting all contents of the file twice before the file is again re-opened within MyStep.process.

With this PR only the nodes under roman.meta are accessed and included for get_crds_parameters. This PR does not query crds for the required parameter selectors (parkeys) as:

• there doesn't appear to be an API for reliably getting these parkeys
• even with an API some coordination with stpipe would likely be called for as it has a crds dependency (unlike roman_datamodels)

Querying crds would allow fewer metadata entries to be loaded (which is a very minor improvement that might be offset by the crds API) and would protect against the unlikely case that a non-roman.meta attribute is used as a selector.

This PR also fixes the "include_arrays" filtering for DataModel.to_flat_dict.

Regression tests: https://github.com/spacetelescope/RegressionTests/actions/runs/10268370867
show unrelated failures due to background changes.

Checklist

• Added entry in CHANGES.rst under the corresponding subsection
• updated relevant tests
• updated relevant documentation
• Passed romancal regression testing on Jenkins / PLWishMaster. Link: https://plwishmaster.stsci.edu:8081/job/RT/job/romancal/XXX/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 97.77%. Comparing base (087a60d) to head (d29955c).
Report is 52 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #372      +/-   ##
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+ Coverage   97.56%   97.77%   +0.21%     
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  Files          30       36       +6     
  Lines        2788     3369     +581     
==========================================
+ Hits         2720     3294     +574     
- Misses         68       75       +7     

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[schlafly]

Sorry that it's been a while since you filed this.

With this PR only the nodes under roman.meta are accessed and included for get_crds_parameters. This PR does not query crds for the required parameter selectors (parkeys) as:

there doesn't appear to be an API for reliably getting these parkeys
even with an API some coordination with stpipe would likely be called for as it has a crds dependency (unlike roman_datamodels)

Just making sure I follow, you're saying that you could ask CRDS to say what it needs, and then send it back exactly that, rather than just sending the entire meta contents minus the arrays. I hear you and agree that we shouldn't need to do that and your PR is good as is.