fix(api): add X-Cache-Status header for refresh=true responses (JhaSourav07#943)

Author: sudha09-git

app/api/streak/route.ts

@@ -163,6 +163,7 @@ export async function GET(request: Request) {
         'Content-Type': 'image/svg+xml',
         'Cache-Control': cacheControl,
         'Content-Security-Policy': SVG_CSP_HEADER,
+        'X-Cache-Status': refresh ? `BYPASS, fetched=${new Date().toISOString()}` : 'HIT',
       },
     });
   } catch (error: unknown) {