feat(analysis): add monthly variation table with inflation comparison

- New backend endpoint GET /api/quotes/monthly-last
- MonthlyVariationTable component with BELO/Blue/Oficial % changes
- Inflation data from ArgentinaDatos API with 24h cache
- Visual indicators: green if beats inflation, red if below
- Responsive: cards on mobile, table on desktop

apps/frontend/src/features/analysis/AnalysisPage.tsx

@@ -14,6 +14,7 @@ import {
 } from "recharts";
 import { DatePicker } from "@/components/ui/date-picker";
 import { useDailyQuotes, useHistoricalMinMax, useQuotes } from "@/lib/queries";
+import { MonthlyVariationTable } from "./components/MonthlyVariationTable";
 
 const CURRENCIES = ["BELO", "BLUE", "BNA"] as const;
 
@@ -576,6 +577,13 @@ export function AnalysisPage({ currency }: { currency: string }) {
           </>
         )}
       </div>
+
+      <div className="rounded-lg border p-4">
+        <h2 className="text-sm font-medium mb-4">
+          Variación mensual vs. inflación
+        </h2>
+        <MonthlyVariationTable />
+      </div>
     </div>
   );
 }