chore(changeset): patch for the re-measured lookup-picker reader prose

Both changed paths are inside @objectstack/spec's published files[] and both were
measured present in the real tarball (npm pack --dry-run), so the corrected text
ships.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016N6xmWt5hYm94ffVEwGH8x

Author: claude

.changeset/lookup-picker-reader-prose-remeasured.md

@@ -0,0 +1,13 @@
+---
+"@objectstack/spec": patch
+---
+
+The lookup-picker "who reads this" claims in `packages/spec` are re-measured against objectui and dated to the commit they were measured on. No schema, accept set, default or refusal moves — this is evidence prose, and every verdict it sits under is unchanged.
+
+Three claims had gone false, all in the same direction: they credited objectui's picker with reading a `snake_case` alias that objectui no longer reads. A stale *tolerance* claim fails in the dangerous direction — it tells an author a spelling is accepted downstream when it is not, so a value that will silently arrive as nothing looks supported by the spec's own prose.
+
+- **`liveness/field.json`, both `displayField` notes.** `/props/displayField` claimed the record picker "reads displayField || display_field"; `/props/inlineColumns/children/displayField` named the `snake_case` spelling flatly as *the* key the grid's lookup cells pass. objectui deleted that twin from `LookupFieldMetadata` with no deprecation window and no dual read. Both notes now name the read chain they actually have — `LookupField.tsx`'s `fieldMeta?.displayField || fieldMeta?.reference_field || 'name'`, and `GridField.tsx` handing the column's camelCase `displayField` straight through at all three lookup-cell call sites. Both entries stay `status: "live"`: `displayField` is live, and more exclusively so than the notes claimed.
+- **`src/data/field.zod.ts`, the LOOKUP PICKER (forward) docblock.** It told authors that objectui's `LookupField` / `RecordPickerDialog` / `deriveLookupColumns` read "both these camelCase keys and their snake_case aliases" — a blanket claim over all seven keys declared beneath it. Measured, it holds for three: `lookupColumns`, `lookupPageSize` and `allowCreate` are each read as `<snake> ?? <camel>`. The other four — `displayField`, `descriptionField`, `lookupFilters` and `dependsOn` — are read camelCase-only. The docblock now states that per key, keeps saying the truth for the three aliases that survive, and records that those three are objectui's own back-compat rather than a spelling this schema declares.
+- **`liveness/field.json`, the `valueDomain` `evidence` string.** It described the shared membership predicate as one "the write path **will** call" while its own first clause already quotes the landed call site that calls it. Tense corrected; the pointer is unchanged.
+
+Each rewritten claim now names the objectui commit it is dated to, so a later reader can tell how old the evidence is instead of assuming it is current. That dating is prose by design: a gate over a pinned foreign tree would go stale at every pin bump and need its own anti-vacuity self-test, which is a worse trade than a dated sentence.