fix: upgrade Python and vulnerable test dependencies

[rasteja]

What changed

• Sets PSA runtime support to Python 3.13 (>=3.13,<3.14).
• Resolves pytest to 9.1.1 through the >=9.0.3,<10 constraint.
• Resolves urllib3 to 2.7.0 through the >=2.5.0,<3 constraint.
• Resolves filelock to 3.32.2 through the >=3.20.3,<4 constraint.
• Resolves idna to 3.18 through the dependency graph.
• Resolves requests to 2.34.2 through the >=2.33.0,<3 constraint.

PSA vulnerability tickets remediated

• VULN-99752 — filelock 3.12.2 → 3.32.2 (required >=3.20.3)
• VULN-99761 — idna 3.10 → 3.18 (required >=3.15)
• VULN-99789 — pytest 7.4.4 → 9.1.1 (required >=9.0.3)
• VULN-99802 — requests 2.31.0 → 2.34.2 (required >=2.33.0)

Related downstream RFCT tickets

• VULN-53759 — urllib3 >=2.5.0
• VULN-86496 — pytest >=9.0.3

This PSA PR provides the compatible PSA versions needed by RFCT, but it does not close those RFCT tickets: their FOSSA findings are against taautomation/regression_field_comparison_tool's own poetry.lock, which requires a separate RFCT remediation PR.

Validation

• PSA Python 3.13 unit suite: 525 passed.
• poetry check --lock passed.
• poetry run pip check passed.
• RFCT main with this local PSA candidate, pytest 9.1.1, urllib3 2.7.0, and CIM models 6.4.0: 15 passed.

Compatibility impact

This intentionally drops Python 3.7–3.12 support because the selected pytest version requires Python 3.10+, and this PR standardizes PSA on Python 3.13.

[rasteja]

@codex Please review the additional dependency-vulnerability remediation in 95e5d72.\n\nResolved lock selections: filelock 3.12.2 -> 3.32.2 (VULN-99752), idna 3.10 -> 3.18 (VULN-99761), pytest remains 9.1.1 (VULN-99789), and requests 2.31.0 -> 2.34.2 (VULN-99802).\n\nValidation: poetry check --lock; poetry run pip check; poetry run pytest -v tests/unit (525 passed, Python 3.13).

[chatgpt-codex-connector]

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[chatgpt-codex-connector]

Remove the obsolete Python 3.7 support claim

The package now requires Python 3.13, but its published classifiers still claim Python 3.7 support, and the user-facing prerequisites in docs/index.md:15, docs/how_to_use.md:59, and docs/troubleshoot.md:24 continue directing users to Python 3.7. Anyone following those instructions will have installation rejected by the new Requires-Python constraint, so the stale classifier and documentation should be updated with this compatibility change.

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[rasteja]

Addressed in 8e0ef43: removed the Python 3.7 classifier and updated the support and installation troubleshooting docs to Python 3.13. The docs/how_to_use.md 3.7 reference is Docker Compose file-format version 3.7, not a Python support claim, so it remains unchanged. Validation: poetry check --lock and 525 unit tests passed.