fix: enable horizontal scroll in entity lookup and increase timeout to 120s

Replace Radix ScrollArea with plain overflow-auto div to allow nested
horizontal scrolling in lookup result tables. Add overflow-auto to
table containers. Increase per-database search timeout from 30s to 120s.

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

src/components/lookup/LookupResultGroup.tsx

@@ -98,7 +98,7 @@ export function LookupResultGroup({ dbResult }: Props) {
                 </button>
 
                 {isOpen && table.columns.length > 0 && (
-                  <div className="h-[200px] border-t">
+                  <div className="h-[200px] overflow-auto border-t">
                     <ResultsTable
                       columns={table.columns}
                       types={table.types}