fix: move renderStart after debugTime for accurate perf measurement

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

packages/core/src/utils/debug-collector.ts

@@ -94,7 +94,7 @@ export class DebugCollector {
       this.entries = this.entries.slice(-MAX_ENTRIES);
     }
     for (const fn of this.subscribers) {
-      try { fn(entry); } catch { /* swallow subscriber errors */ }
+      try { fn(entry); } catch { /* subscriber errors must not break debug flow */ }
     }
   }
 }

packages/react/src/SchemaRenderer.tsx

@@ -230,8 +230,8 @@ export const SchemaRenderer = forwardRef<any, { schema: SchemaNode } & Record<st
     }
   }
 
-  const renderStart = isDebug ? performance.now() : 0;
   debugTime(`render:${evaluatedSchema.type}:${evaluatedSchema.id ?? 'anon'}`);
+  const renderStart = isDebug ? performance.now() : 0;
   const rendered = (
     <SchemaErrorBoundary componentType={evaluatedSchema.type}>
       {React.createElement(Component, {