fix(python-sdk): harden pytest tempdir handling

[santoshkumarradha]

Summary

• move Python 3.10+ dev dependencies to the patched pytest 9.0.3 line
• update Python 3.10+ compatibility pins for pytest-asyncio and syrupy so the dev stack resolves cleanly with pytest 9
• run SDK tests through a wrapper that sets a private PYTEST_DEBUG_TEMPROOT to avoid pytest's predictable default temp root in CI and local runs

Verification

• installed the Python 3.12 dev dependency set from sdk/python/requirements-dev.txt in a clean venv
• ran scripts/run_pytest.sh tests/test_memory_events.py -v --no-cov with pytest 9.0.3, pytest-asyncio 1.3.0, syrupy 5.1.0

[github-actions]

Performance

SDK	Memory	Δ	Latency	Δ	Tests	Status
Python	7.9 KB	-13%	0.25 µs	-29%	✓	✓

✓ No regressions detected