Fix PyTorch predicate array-like inputs

[FlorianPfaff]

Patch PyTorch backend predicate helpers so ordinary scalar and array-like inputs are accepted. Adds a focused backend regression test. Local syntax checks passed; full test execution should run in CI.

[github-actions]

✅MegaLinter analysis: Success

Descriptor	Linter	Files	Fixed	Errors	Warnings	Elapsed time
✅ COPYPASTE	jscpd	yes		no	no	47.02s
✅ JSON	prettier	7	0	0	0	0.78s
✅ JSON	v8r	7		0	0	3.74s
✅ MARKDOWN	markdownlint	68	0	0	0	1.25s
✅ MARKDOWN	markdown-table-formatter	68	0	0	0	0.62s
✅ PYTHON	black	1095	0	0	0	40.92s
✅ PYTHON	isort	1095	0	0	0	2.06s
✅ REPOSITORY	checkov	yes		no	no	33.0s
✅ REPOSITORY	gitleaks	yes		no	no	7.99s
✅ REPOSITORY	git_diff	yes		no	no	0.12s
✅ REPOSITORY	secretlint	yes		no	no	25.87s
✅ REPOSITORY	syft	yes		no	no	2.45s
✅ REPOSITORY	trivy-sbom	yes		no	no	8.05s
✅ REPOSITORY	trufflehog	yes		no	no	12.82s
✅ YAML	prettier	11	0	0	0	0.62s
✅ YAML	v8r	11		0	0	7.81s
✅ YAML	yamllint	11		0	0	0.34s

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