docs: update architecture diagram with Asaas, Stripe and Backoffice connections

README.md

@@ -55,15 +55,22 @@ SaveInMed é uma solução completa que oferece:
 
     subgraph "External Services"
         MP[Mercado Pago<br/>Payments]
+        AS[Asaas<br/>Payments]
+        ST[Stripe<br/>Payments]
     end
 
     MKT -->|Marketplace| API
+    MKT -->|Auth/Profile| BACK
     
     API --> PG
     BACK --> PG
     
     API --> MP
+    API --> AS
+    API --> ST
     BACK --> MP
+    BACK --> AS
+    BACK --> ST
 
     style WEB fill:#4ade80
     style MKT fill:#60a5fa