Array API: locate the source of __array__(copy=...) DeprecationWarnings in CuPy runs

[mwcraig]

Problem

#912 reports 15+ tests emitting:

DeprecationWarning: __array__ implementation doesn't accept a copy keyword, so passing copy=False failed...

ccdproc itself defines no __array__ method anywhere in the package (verified by grep), so the offending implementation lives upstream — most likely astropy's NDData/CCDData, astropy.units, or the CuPy interop layer.

Task

• Run the CuPy (or proxy-backend) suite with -W error::DeprecationWarning to turn these into hard failures with full tracebacks.
• Identify which class's __array__ lacks the numpy-2 copy keyword.
• File the fix upstream (link it from Tracking: upstream array-API blockers (astropy, reproject, astroscrappy) #940) or work around it locally if it is in the wrapper's interaction with astropy.

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Found during a review of the array API implementation from #885; follow-up to #909 / #912.