fix(skills): regenerate the objectstack-data reference index

`view.zod.ts` now imports `chart.zod.ts` (for the extracted list-chart
subset), so the taxonomy joins that skill's transitive reference set.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Author: os-zhuang

skills/objectstack-data/references/_index.md

@@ -29,6 +29,7 @@ from `node_modules` — there is no local copy in the skill bundle.
 - `node_modules/@objectstack/spec/src/shared/protection.zod.ts` — Package-level metadata protection (ADR-0010 §3.7 — Phase 4.3)
 - `node_modules/@objectstack/spec/src/shared/suggestions.zod.ts` — "Did you mean?" Suggestion Utilities
 - `node_modules/@objectstack/spec/src/ui/action.zod.ts` — Action Parameter Schema
+- `node_modules/@objectstack/spec/src/ui/chart.zod.ts` — Unified Chart Type Taxonomy
 - `node_modules/@objectstack/spec/src/ui/i18n.zod.ts` — I18n Object Schema
 - `node_modules/@objectstack/spec/src/ui/responsive.zod.ts` — Breakpoint Name Enum
 - `node_modules/@objectstack/spec/src/ui/sharing.zod.ts` — Sharing & Embedding Protocol