Patch raw PyTorch reshape under NumPy public backend

[FlorianPfaff]

Summary

• add an import-time compatibility hook for raw pyrecest._backend.pytorch.reshape
• coerce array-like reshape inputs through the raw PyTorch backend rather than the active public backend
• cover the NumPy-public-backend case with a subprocess regression test

Bug fixed

When PYRECEST_BACKEND=numpy, importing pyrecest left pyrecest._backend.pytorch.reshape as the raw torch.reshape function. Calls such as raw_pytorch.reshape([1, 2, 3, 4], np.array([2, 2])) therefore failed because torch.reshape does not accept Python lists or NumPy-style shape arrays directly. The new hook patches the raw PyTorch helper regardless of the selected public backend while only updating pyrecest.backend.reshape when the public backend is actually PyTorch.

Testing

• Added tests/backend_support/test_raw_pytorch_reshape_contract.py
• Not run locally; this execution environment cannot clone the GitHub repository directly.

[github-actions]

✅MegaLinter analysis: Success

Descriptor	Linter	Files	Fixed	Errors	Warnings	Elapsed time
✅ COPYPASTE	jscpd	yes		no	no	61.06s
✅ JSON	prettier	7	0	0	0	1.01s
✅ JSON	v8r	7		0	0	4.29s
✅ MARKDOWN	markdownlint	68	0	0	0	1.8s
✅ MARKDOWN	markdown-table-formatter	68	0	0	0	0.71s
✅ PYTHON	black	1207	37	0	0	59.22s
✅ PYTHON	isort	1207	72	0	0	2.86s
✅ REPOSITORY	checkov	yes		no	no	47.56s
✅ REPOSITORY	gitleaks	yes		no	no	11.19s
✅ REPOSITORY	git_diff	yes		no	no	0.32s
✅ REPOSITORY	secretlint	yes		no	no	45.8s
✅ REPOSITORY	syft	yes		no	no	5.02s
✅ REPOSITORY	trivy-sbom	yes		no	no	5.21s
✅ REPOSITORY	trufflehog	yes		no	no	15.09s
✅ YAML	prettier	11	0	0	0	0.67s
✅ YAML	v8r	11		0	0	8.92s
✅ YAML	yamllint	11		0	0	0.53s

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