fix(workbook): honor AND precedence in mixed conditions

[rudycelekli]

What & why

Mixed workbook conditions currently split on AND before OR. For example, {a} == "yes" OR {b} == "yes" AND {c} == "yes" can skip a column even when the first comparison is true.

Evaluate OR groups of AND terms, using the existing quoted-aware tokenizer and comparison evaluator. This matches ordinary boolean precedence and the automation condition parser. Parenthesized expressions are not added.

Type

• Bug fix

Verification

• The frozen regression file fails 11 cases on main and passes all 17 here. Existing condition tests plus these regressions: 71 passed.
• Independent review checked 112 mixed-expression truth cases, 1,050 compatibility cases, and short-circuit behavior.
• Real _run_one_cell enrichment against migrated SQLite: main 2 failed / 2 controls passed; this branch 4 passed. Both previously skipped mixed conditions now execute the formula and persist its value. No provider or network call.
• The unchanged full PR checks workflow passed all four jobs at signed head 717f6697b79f82a89ba14a684846a6cb24d6ef90: fork verification. Upstream checks will run separately.

Checklist

• Commits are signed off per the DCO
• Backend tests pass, verified with the frozen CI environment
• Monorepo lint and build pass in CI
• No scraping of paywalled, pirated, or login-gated content added
• Credentialed providers remain opt-in and inert by default

Security-sensitive?

This changes boolean grouping in the workbook condition evaluator. It does not change auth, tenancy, outbound fetches, credentials, or LLM handling.