Closes #5261: alignment tests for arkouda.numpy.pdarraycreation

[ajpotts]

Add NumPy alignment verification for array creation APIs

Summary

This PR introduces a comprehensive NumPy alignment verification test suite for Arkouda’s
array-creation APIs (pdarraycreation) and wires it into CI. The intent is to make NumPy
compatibility explicit, testable, and continuously enforced, while clearly documenting
known and intentional divergences.

What’s included

• New test suite

  • tests/numpy/alignment_verification/pdarraycreation_alignment.py
  • Covers:
    • ak.array
    • zeros, ones, full
    • *_like
    • arange
    • linspace
    • logspace
  • Validates alignment with NumPy for:
    • values
    • shapes
    • dtypes
    • error semantics (when NumPy raises)

• Robust exception alignment

  • Tests assert that when NumPy raises, Arkouda raises as well
  • Avoids silent skips; mismatches are explicit and actionable

• Targeted xfails for known Arkouda issues

  • Non-BMP Unicode (emoji) corruption in ak.full / ak.Strings
    • Tracked in Issue Bug: Non-BMP Unicode (Emoji) Corrupted in ak.full / ak.Strings #5266
  • ak.linspace(..., num == 1) scalar case raising ZeroDivisionError
    • Tracked in Issue Bug: ak.linspace Fails for num == 1 (Scalar Case) #5267

• CI integration

  • Adds the new alignment file to pytest.ini

Why this matters

• Establishes a clear contract for NumPy compatibility
• Prevents regressions as Arkouda evolves
• Makes edge-case behavior (errors, dtype handling, strings) visible and reviewable
• Provides a concrete roadmap of alignment gaps to fix next

Non-goals

• Changing Arkouda runtime behavior
• Fixing known alignment bugs (handled in follow-up PRs)
• Expanding coverage beyond array creation APIs

Follow-up work

• Fix ak.linspace handling for num == 1 and remove xfail
• Fix non-BMP Unicode handling in ak.Strings

Testing

pytest tests/numpy/alignment_verification/pdarraycreation_alignment.py

Full CI run includes the new alignment verification tests.

Closes #5261: alignment tests for arkouda.numpy.pdarraycreation