ADR-0053 Phase 2 · Slice 2: thread context into applyFormulaPlan (read-time formula fields)

[os-zhuang]

Part of ADR-0053 Phase 2. Design: #1975 · Parent: #1928.

Slice 2 of 6 — independent of timezone; worth doing on its own. Fix the read-time formula evaluation blind spot.

Problem

applyFormulaPlan evaluates read-time formula virtual fields with only { record } — no now, no execution context, no timezone — packages/objectql/src/engine.ts:88-96, called from find/findOne at engine.ts:1841 and :1907. So today()/daysBetween() inside a formula field run against live wall-clock UTC with no determinism and no user/org access.

Scope

• Thread { now: nowSnap, timezone, user, org } from opCtx.context (the ExecutionContext already held by find/findOne) into applyFormulaPlan.
• Mirror applyFieldDefaults, which already does this correctly — packages/objectql/src/engine.ts:691-719.

Acceptance criteria

• Read-time formula fields receive a pinned now (determinism within one operation) and user/org.
• Once slice 1 lands, they also receive timezone (until then, 'UTC').
• Regression: existing formula fields (e.g. days_to_close in example-crm) unchanged in value.

Depends on

Slice 1 for the timezone value (degrades to 'UTC' without it). The now/user/org threading can land immediately.