Fix MegaLinter lint errors across three files

[Copilot]

Three MegaLinter checks (flake8, pylint, ruff) were failing due to an unused import, out-of-order module-level imports, and a protected-member access warning.

Changes

• src/pyrecest/filters/unscented_kalman_filter.py — removed unused asarray from the backend import (F401/W0611)
• tests/backend/test_jax_random_backend.py — added # noqa: E402 to the imports that intentionally follow pytest.importorskip("jax"), the standard pattern for conditional skip-guarded imports
• tests/filters/test_unscented_kalman_filter.py — added inline # pylint: disable=protected-access on the line that directly accesses _filter_state to test internal UKF behaviour

[github-actions]

✅MegaLinter analysis: Success

Descriptor	Linter	Files	Fixed	Errors	Warnings	Elapsed time
✅ COPYPASTE	jscpd	yes		no	no	12.64s
✅ JSON	prettier	2	0	0	0	0.39s
✅ JSON	v8r	2		0	0	2.35s
✅ MARKDOWN	markdownlint	28	0	0	0	1.08s
✅ MARKDOWN	markdown-table-formatter	28	0	0	0	0.24s
✅ PYTHON	bandit	554		0	0	7.34s
✅ PYTHON	black	554	8	0	0	12.01s
✅ PYTHON	flake8	554		0	0	4.37s
✅ PYTHON	isort	554	9	0	0	0.84s
✅ PYTHON	mypy	554		0	0	6.14s
✅ PYTHON	pylint	554		0	0	81.7s
✅ PYTHON	ruff	554	9	0	0	0.09s
✅ REPOSITORY	checkov	yes		no	no	25.35s
✅ REPOSITORY	gitleaks	yes		no	no	8.3s
✅ REPOSITORY	git_diff	yes		no	no	0.05s
✅ REPOSITORY	osv-scanner	yes		no	no	1.09s
✅ REPOSITORY	secretlint	yes		no	no	8.1s
✅ REPOSITORY	syft	yes		no	no	6.35s
✅ REPOSITORY	trivy-sbom	yes		no	no	2.89s
✅ REPOSITORY	trufflehog	yes		no	no	18.17s
✅ YAML	prettier	5	0	0	0	0.45s
✅ YAML	v8r	5		0	0	4.93s
✅ YAML	yamllint	5		0	0	0.43s

Notices

📣 MegaLinter 9.5.0 is out! Discover the new features and security recommendations in the release announcement. (Skip this info by defining SECURITY_SUGGESTIONS: false)

See detailed reports in MegaLinter artifacts

Your project could benefit from a custom flavor, which would allow you to run only the linters you need, and thus improve runtime performances. (Skip this info by defining FLAVOR_SUGGESTIONS: false)

• Documentation: Custom Flavors
• Command: npx mega-linter-runner@9.5.0 --custom-flavor-setup --custom-flavor-linters PYTHON_PYLINT,PYTHON_BLACK,PYTHON_FLAKE8,PYTHON_ISORT,PYTHON_BANDIT,PYTHON_MYPY,PYTHON_RUFF,COPYPASTE_JSCPD,JSON_V8R,JSON_PRETTIER,MARKDOWN_MARKDOWNLINT,MARKDOWN_MARKDOWN_TABLE_FORMATTER,REPOSITORY_CHECKOV,REPOSITORY_GIT_DIFF,REPOSITORY_GITLEAKS,REPOSITORY_OSV_SCANNER,REPOSITORY_SECRETLINT,REPOSITORY_SYFT,REPOSITORY_TRIVY_SBOM,REPOSITORY_TRUFFLEHOG,YAML_PRETTIER,YAML_YAMLLINT,YAML_V8R

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