review(wineaccess): add deterministic task verifiers

[reacher-z]

Reviewer contribution

This builds on #75 while preserving Steven Dillmann's original WineAccess commit and authorship. The reviewer changes are isolated in a second commit.

What changed

• added deterministic verifier entry points for all 18 WineAccess tasks
• added task-specific navigation checks so a frozen answer without the required browser work fails
• added SQLite before/after checks for all nine state-changing tasks: cart additions, saved-cellar addition, account preference update, club join, account creation at checkout, cart removal, and completed checkout
• added exact seeded credentials to every standalone task that requires login
• added explicit judge_rubric and verifier_path contracts without adding an answer key

Verification

• python3 -m unittest discover -s sites/wineaccess/verify -p 'test_*.py' -v: 7 test groups pass
• 18/18 positive cases pass
• 18/18 no-op runs fail
• 18/18 prior-knowledge shortcuts fail
• 18/18 wrong-answer cases fail
• 9/9 stateful claims fail when the live database is unchanged
• all 18 verifier wrappers were exercised for pass and fail exit codes
• py_compile and git diff --check pass
• isolated WineAccess runtime health returned 60 wines; Contact and Where We Ship facts were confirmed through HTTP
• a real Carol login + Connoisseurs Club join changed live SQLite from 0 to 1 matching membership and passed the task-10 verifier; the live DB was then reset byte-identically to the seed

Dependency

The underlying WineAccess mirror and its paired assets remain owned by #75 and its Hugging Face assets PR. This reviewer PR should be reviewed together with those source contributions; it does not claim their authorship.