Pull request #1097: CAS-14782
Merge in CASA/casa6 from CAS-14782 to master
* commit 'e32d860168580a1d45efdf67eacd83efd4b6d9f5':
enable unittests again
Change relative error bound for values close to machine precision
Add old cycleniter guardrail, and improve documentation
Simplify code and update unit test
Move CG option to new helper function, enable channel-wise loading and disk-backed arrays
Force the use of cycleniter for CG
Add onefield test and make onefield test working by returning dictionary
mvc needs another call of tt2cube before recalling major cycle
Change default value and make method available for mtmfs as well
Add relaxation option
Copy over CG-CLEAN method from ARDG-LibRA to CASA Method is described in detail in: https://ui.adsabs.harvard.edu/abs/2026A%26A...706A...77M/abstract (Mueller, Genie, Bhatnagar 2026: Accelerating the CLEAN algorithm of radio interferometry with convex optimization) For now, only the CG option is implemented, with momentum acceleration to follow later. Implementation is done by adding a new keyword to tclean (majorcycle) detailing which major loop heuristics is used, i.e. CS (Cotton-Schwab) or CG (conjugate gradients) The algorithm and its improvements are tested for continuum, polarization and cube imaging, with a variety of gridders including mosaics,w/a/aw-projection, TBD: validation for mvc A shallow set of examples to reproduce the improvements is linked to the Jira ticket
Pull request #1098: CAS-14893
Merge in CASA/casa6 from CAS-14893 to master
* commit '4bd0cbff4d3f2555e1a79f5cbcb9fff118faebe2':
Update appendatab overwrite description
Improve support for ANTAB files
Fix failing test in MacOS
Reuse INT_TO_STOKES
Implements task exportantab according to ticket CAS-14893
Initial draft for CAS-14893
