Updates for 26.3

[weaverba137]

This PR allows the nightly GFA summary script to run on desimodules/26.3. It currently runs on desimodules/main, but that will eventually be supplanted.

The biggest non-cosmetic code changes are due to API changes in astropy and photutils.

I ran a comparison test as follows:

1. I copied ${DESI_ROOT}/survey/GFA/offline_matched_coadd_ccds_main-thru_20260505.fits to ${DESI_ROOT}/survey/GFA.test.26.3.
2. I created a separate intermediate reduction directory, ${DESI_ROOT}/users/desi/GFA/reduced/realtime_matched.test.26.3.
3. With desimodules/26.3 and this branch, I ran the script desi_gfa_reduce_daily_summary on nights 20260506, 20260507, 20260508, 20260509, 20260510, 20260511.
4. I compared the resulting file ${DESI_ROOT}/survey/GFA.test.26.3/offline_matched_coadd_ccds_main-thru_20260511.fits to ${DESI_ROOT}/survey/GFA/offline_matched_coadd_ccds_main-thru_20260511.fits. I could not find any numerical differences.
5. I would encourage you to do the comparison yourself. A helper notebook can be found in ${DESI_ROOT}/users/bweaver/JupyterNotebooks/test_gfa_reduce_26.3.ipynb.

I'm still working on some test failures.

[coveralls]

Coverage Report for CI Build 25763423248

Coverage remained the same at 1.12%

Details

• Coverage remained the same as the base build.
• Patch coverage: 20 uncovered changes across 3 files (0 of 20 lines covered, 0.0%).
• 3 coverage regressions across 2 files.

Uncovered Changes

File	Changed	Covered	%
py/gfa_reduce/analysis/util.py	15	0	0.0%
py/gfa_reduce/analysis/segment.py	3	0	0.0%
py/gfa_reduce/analysis/phot.py	2	0	0.0%

Coverage Regressions

3 previously-covered lines in 2 files lost coverage.

File	Lines Losing Coverage	Coverage
py/gfa_reduce/analysis/util.py	2	0.0%
py/gfa_reduce/analysis/phot.py	1	0.0%

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Coverage Stats

Relevant Lines:	3841
Covered Lines:	43
Line Coverage:	1.12%
Coverage Strength:	0.01 hits per line

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💛 - Coveralls