feat: support heterogeneous vector-vector numeric unification (closes #270)#271

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Jaskirat-s7 wants to merge 3 commits intoarxlang:mainfrom

Jaskirat-s7:feat/vector-numeric-unification-270

Commits on Apr 2, 2026

test(#38): port float comparison and while float tests onto main (rebased from PR #239)
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fix: reorder imports in test_binary_op.py to satisfy ruff isort
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feat(#270): support heterogeneous vector-vector numeric unification
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