test(spec): the field form omits currencyConfig.homeAmount until the engine writes it

The form/Zod reconciliation gate refuses a key the Zod accepts and the form
does not offer. `homeAmount` is offered in no form yet, deliberately: nothing
writes the home amount until the write-time projection lands in the same
release, so the gate's ledger carries a `planned` omit, the precedent of the
other spec-first keys.

Co-Authored-By: Claude <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_017ihL2fi9zfJhUTubyJYb6V

Author: claude

packages/spec/src/system/metadata-form-zod-reconciliation.test.ts

@@ -365,6 +365,16 @@ const LEDGER: ReadonlyArray<OmitEntry | SubsetEntry> = [
     key: 'conditionalFormatting',
     why: "planned, not yet rendered — a field's cell formatting rules (`[{ condition, style }]`, the list view's own rule element) are validated at parse and their CEL is judged at the authoring doors (it parses, it reads only `value` and `record`), but no renderer styles a cell from them until objectui's cell renderers read them, after the spec publishes. A form control offered today would let an author set a style nothing paints",
   },
+  // [ADR-0144 D5] A record-mode amount's home-currency projection lands
+  // spec-first the same way: declared and judged at parse, written by nothing
+  // until the engine's write-time projection lands in the same release (D9).
+  {
+    kind: 'omit',
+    type: 'field',
+    path: 'currencyConfig',
+    key: 'homeAmount',
+    why: "planned, not yet written — the `{ field, rateDate, rateField }` pointers are validated at parse (all three required, each judged against the object's field map), but no engine converts the amount or stores the home amount and the rate until the write-time home-currency projection lands, which ADR-0144 D9 releases with this key. A form control offered today would let an author declare a home amount nothing writes",
+  },
   {
     kind: 'omit',
     type: 'view',