ref(perf): Reorder columns in EAP sampled events table

Move Span ID to the first column and Trace ID after Total Duration
for a more natural reading order: Span ID, User, HTTP Method,
Total Duration, Trace ID, Timestamp, Replay, Profile.

Co-Authored-By: Claude Opus 4.6 <noreply@example.com>

Author: mjq

static/app/views/performance/eap/overviewSpansTable.tsx

@@ -65,11 +65,11 @@ type OverviewSpansColumn = GridColumnHeader<
 >;
 
 const BASE_COLUMN_ORDER: OverviewSpansColumn[] = [
-  {key: 'trace', name: t('Trace ID'), width: COL_WIDTH_UNDEFINED},
   {key: 'span_id', name: t('Span ID'), width: COL_WIDTH_UNDEFINED},
   {key: 'user.display', name: t('User'), width: COL_WIDTH_UNDEFINED},
   {key: 'request.method', name: t('HTTP Method'), width: COL_WIDTH_UNDEFINED},
   {key: 'span.duration', name: t('Total Duration'), width: COL_WIDTH_UNDEFINED},
+  {key: 'trace', name: t('Trace ID'), width: COL_WIDTH_UNDEFINED},
   {key: 'timestamp', name: t('Timestamp'), width: COL_WIDTH_UNDEFINED},
 ];