docs: align README support and dependency guidance

[mldangelo-oai]

Summary

• align the public README and package metadata with supported Python 3.10-3.13
• clarify that modelaudit[all] is broad portable coverage and TensorFlow remains an explicit extra
• refresh supported-format/compatibility docs, telemetry privacy wording, PyPI-safe links, and changelog entry

Tests

• uv lock --check
• uv run ruff format --check modelaudit/ packages/modelaudit-picklescan/src packages/modelaudit-picklescan/tests tests/
• uv run ruff check modelaudit/ packages/modelaudit-picklescan/src packages/modelaudit-picklescan/tests tests/
• uv run mypy modelaudit/ packages/modelaudit-picklescan/src packages/modelaudit-picklescan/tests tests/
• PROMPTFOO_DISABLE_TELEMETRY=1 uv run pytest -n auto -m "not slow and not integration" --maxfail=1
• npx prettier --check CHANGELOG.md README.md docs/user/compatibility-matrix.md docs/agents/dependencies.md docs/user/offline-air-gapped.md docs/user/security-model.md
• git diff --check

[github-actions]

Workflow run and artifacts

Performance Benchmarks

Compared 19 shared benchmarks with a regression threshold of 15%.
Status: 0 regressions, 0 improved, 19 stable, 0 new, 0 missing.
Aggregate shared-benchmark median: 181.65ms -> 181.78ms (+0.1%).

Benchmark	Target	Size	Files	Baseline	Current	Change	Status
tests/benchmarks/test_picklescan_benchmarks.py::test_picklescan_dangerous_global_payloads[malicious_reduce]	malicious_reduce	52 B	1	63.4us	60.8us	-4.2%	stable
tests/benchmarks/test_picklescan_benchmarks.py::test_picklescan_multi_stream_padded_payload	multi_stream_padded	4.1 KiB	1	111.8us	115.6us	+3.4%	stable
tests/benchmarks/test_picklescan_benchmarks.py::test_picklescan_safe_payloads[safe_small]	safe_small	68 B	1	47.8us	46.2us	-3.2%	stable
tests/benchmarks/test_picklescan_benchmarks.py::test_picklescan_nested_payloads[nested_base64]	nested_base64	98 B	1	85.5us	83.2us	-2.7%	stable
tests/benchmarks/test_picklescan_benchmarks.py::test_picklescan_opcode_budget_tail_payload	opcode_budget_tail	14 B	1	58.4us	57.2us	-2.2%	stable
tests/benchmarks/test_picklescan_benchmarks.py::test_picklescan_nested_payloads[nested_hex]	nested_hex	130 B	1	90.0us	88.1us	-2.1%	stable
tests/benchmarks/test_picklescan_benchmarks.py::test_picklescan_nested_payloads[nested_raw]	nested_raw	78 B	1	80.3us	78.8us	-2.0%	stable
tests/benchmarks/test_picklescan_benchmarks.py::test_picklescan_chunked_stream	chunked_stream	278.2 KiB	1	6.74ms	6.81ms	+1.0%	stable
tests/benchmarks/test_picklescan_benchmarks.py::test_picklescan_dangerous_global_payloads[stack_global]	stack_global	21 B	1	53.3us	52.7us	-1.0%	stable
tests/benchmarks/test_picklescan_benchmarks.py::test_picklescan_hidden_suspicious_string_budget	hidden_suspicious_string	8.0 KiB	1	598.1us	592.6us	-0.9%	stable
tests/benchmarks/test_scan_benchmarks.py::test_scan_safe_pickle	safe_model.pkl	49.4 KiB	1	10.82ms	10.91ms	+0.8%	stable
tests/benchmarks/test_scan_benchmarks.py::test_scan_pytorch_zip	state_dict.pt	1.5 MiB	1	31.03ms	30.83ms	-0.6%	stable
tests/benchmarks/test_picklescan_benchmarks.py::test_picklescan_safe_payloads[safe_large]	safe_large	278.2 KiB	1	3.75ms	3.77ms	+0.6%	stable
tests/benchmarks/test_scan_benchmarks.py::test_detect_file_format_safe_pickle	safe_model.pkl	49.4 KiB	1	24.6us	24.5us	-0.5%	stable
tests/benchmarks/test_scan_benchmarks.py::test_skip_filter_plain_text_files	-	4.6 KiB	256	10.16ms	10.21ms	+0.5%	stable
tests/benchmarks/test_scan_benchmarks.py::test_validate_file_type_pytorch_zip	state_dict.pt	1.5 MiB	1	44.2us	44.4us	+0.5%	stable
tests/benchmarks/test_picklescan_benchmarks.py::test_picklescan_safe_payloads[long_benign_string]	long_benign_string	1.0 MiB	1	1.17ms	1.17ms	+0.2%	stable
tests/benchmarks/test_scan_benchmarks.py::test_scan_mixed_directory	mixed-corpus	1.7 MiB	54	72.44ms	72.53ms	+0.1%	stable
tests/benchmarks/test_scan_benchmarks.py::test_scan_duplicate_directory	duplicate-corpus	840.0 KiB	81	44.29ms	44.31ms	+0.0%	stable