fix(perf): Clamp negative otherPercentage in operation duration breakdown

The `otherPercentage` value could go negative due to floating-point
drift, producing an invalid negative CSS width. Use Math.max to clamp
it to zero.

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

Author: mjq

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

@@ -432,7 +432,7 @@ function renderOperationDurationCell(row: Record<string, any>, theme: Theme) {
           </div>
         );
       })}
-      <div key="other" style={{width: toPercent(otherPercentage || 0)}}>
+      <div key="other" style={{width: toPercent(Math.max(otherPercentage, 0))}}>
         <Tooltip title={<div>{t('Other')}</div>} containerDisplayMode="block">
           <OtherRelativeOpsBreakdown />
         </Tooltip>