test: keep expired iso smoke profiles explicit

Issue: #168
User-Visible: no

demo/performance/README.md

@@ -4,10 +4,11 @@
 fixture. The fixture has 60 rooms, 200 devices, 100 openings, 60 partitions,
 40 columns and 500 decor objects on three floors.
 
-Issue #89 adds `large-house-isometric-v1` through the same runner. It enables
-`hp-labs=iso`, selects iso per fixture space, measures the View toggle and
-records the capped `isoGeometry` cache. A comparison SHA predating #89 remains
-flat while reporting the same profile. The dedicated
+Issue #89 adds `large-house-isometric-v1` through the same runner. Because the
+product flag expires at 1.65.0, the runner injects an explicit test-only Labs
+snapshot, selects iso per fixture space, measures the View toggle and records
+the capped `isoGeometry` cache. A comparison SHA predating #89 remains flat
+while reporting the same profile. The dedicated
 `budgets-large-house-isometric.json` applies the reviewed 20% relative allowance
 plus absolute noise/ceiling checks. Only the exact-SHA Linux workflow is gate
 evidence; a local report is diagnostic.

demo/performance/card-contract.mjs

@@ -40,8 +40,10 @@ export const LARGE_HOUSE_CARD_CONTRACT = Object.freeze({
     '_tool',
   ]),
   // A comparison SHA before #89 is intentionally flat; the isometric runner
-  // checks these two members only when the target source tree supports Stage 1.
-  optionalFields: Object.freeze(['_isoGeometryCache', '_planSnapGeometryCache', '_setProjection']),
+  // checks these members only when the target source tree supports Stage 1.
+  optionalFields: Object.freeze([
+    '_isoGeometryCache', '_onLabsSnapshot', '_planSnapGeometryCache', '_setProjection',
+  ]),
   fieldTypes: Object.freeze({
     _booting: 'boolean',
     _cleanFloorCache: 'map',
@@ -50,6 +52,7 @@ export const LARGE_HOUSE_CARD_CONTRACT = Object.freeze({
     _gridPitch: 'number',
     _loadOk: 'boolean',
     _model: 'array',
+    _onLabsSnapshot: 'function',
     _path: 'array',
     _isoGeometryCache: 'map',
     _planSnapGeometryCache: 'object',