cowork: fix packaging-quality tests on Python 3.10 (tomllib compat)

[Coding-Dev-Tools]

Summary

Two TestPackagingQuality tests in tests/test_cli_edge_cases.py imported tomllib unconditionally. tomllib is stdlib only from Python 3.11+, so these tests raise ModuleNotFoundError on Python 3.10 — a version the project declares as supported (requires-python = '>=3.10' and a Programming Language :: Python :: 3.10 classifier). CI only runs 3.11–3.13, so the failure was invisible in CI but breaks anyone testing on the declared minimum.

Changes

• tests/test_cli_edge_cases.py: import tomllib with a tomli fallback for 3.10; drop the two inline imports; sort the import block (ruff I001).
• pyproject.toml: add tomli>=2.0.0; python_version < '3.11' to the dev extra so the fallback resolves on 3.10.

Verification

• test_cli_edge_cases.py: 7/7 pass on Python 3.10 (was 2 failing).
• 274 core tests green; all 474 collect without import errors.
• ruff check src/ --target-version py310 clean.

🤖 cowork repo-improver-rotation

[github-actions]

🤖 Automated Code Review

⚠️ Ruff Lint — 8 issue(s)

::error title=ruff (I001),file=/home/runner/work/envault/envault/_qa_repro_test.py,line=2,endLine=5::_qa_repro_test.py:2:1: I001 Import block is un-sorted or un-formatted%0A  help: Organize imports
::error title=ruff (I001),file=/home/runner/work/envault/envault/_qa_test_scan.py,line=2,endLine=5::_qa_test_scan.py:2:1: I001 Import block is un-sorted or un-formatted%0A  help: Organize imports
::error title=ruff (E402),file=/home/runner/work/envault/envault/_qa_test_scan.py,line=35,col=1,endLine=35,endColumn=21::_qa_test_scan.py:35:1: E402 Module level import not at top of file
::error title=ruff (I001),file=/home/runner/work/envault/envault/tests/test_encrypt_formats.py,line=7,endLine=9::tests/test_encrypt_formats.py:7:1: I001 Import block is un-sorted or un-formatted%0A  help: Organize imports
::error title=ruff (I001),file=/home/runner/work/envault/envault/tests/test_encrypt_secret_formats.py,line=7,endLine=10::tests/test_encrypt_secret_formats.py:7:1: I001 Import block is un-sorted or un-formatted%0A  help: Organize imports
::error title=ruff (I001),file=/home/runner/work/envault/envault/tests/test_history.py,line=3,endLine=7::tests/test_history.py:3:1: I001 Import block is un-sorted or un-formatted%0A  help: Organize imports
::error title=ruff (F403),file=/home/runner/work/envault/envault/tests/test_history.py,line=6,col=1,endLine=6,endColumn=30::tests/test_history.py:6:1: F403 `from envault.history import *` used; unable to detect undefined names
::error title=ruff (I001),file=/home/runner/work/envault/envault/tests/test_security_audit.py,line=3,endLine=12::tests/test_security_audit.py:3:1: I001 Import block is un-sorted or un-formatted%0A  help: Organize imports

⚠️ Ruff Format — Formatting needed

Would reformat: _qa_repro_test.py
Would reformat: _qa_test_scan.py
Would reformat: src/envault/audit.py
Would reformat: src/envault/auth.py
Would reformat: src/envault/backup.py
Would reformat: src/envault/cli.py
Would reformat: src/envault/config.py
Would reformat: src/envault/diff.py
Would reformat: src/envault/encrypt.py
Would reformat: src/envault/history.py
Would reformat: src/envault/rotate.py
Would reformat: src/envault/security_audit.py
Would reformat: src/envault/serve.py
Would reformat: src/envault/stores/__init__.py
Would reformat: src/envault/sync.py
Would reformat: tests/test_cli.py
Would reformat: tests/test_cli_edge_cases.py
Would reformat: tests/test_coverage_gaps.py
Would reformat: tests/test_encrypt_formats.py
Would reformat: tests/test_encrypt_secret_formats.py
Would reformat: tests/test_envault.py
Would reformat: tests/test_lint_regression.py
Would reformat: tests/test_security_audit.py
Would reformat: tests/test_serve.py
Would reformat: tests/test_stores_integration.py
Would reformat: tests/test_sync_coverage.py
26 files would be reformatted, 3 files already formatted

🔴 Secret Detection — 1 potential secret(s)

  src/envault/serve.py:36 — Secret Keyword

✅ Large Files — Within limits

📊 Diff Stats — 2 file(s) changed

 pyproject.toml               |  1 +
 tests/test_cli_edge_cases.py | 11 +++++++----
 2 files changed, 8 insertions(+), 4 deletions(-)

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Verdict: 🔴 Changes Requested — Potential secrets detected. Do not merge.

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