Add echo client to app

src/capa_de_integracion/dependencies.py

@@ -2,7 +2,11 @@
 
 from functools import lru_cache
 
-from rag_client import HTTPRAGService, RAGServiceBase
+from capa_de_integracion.services.rag import (
+    EchoRAGService,
+    HTTPRAGService,
+    RAGServiceBase,
+)
 
 from .config import Settings, settings
 from .services import (
@@ -53,6 +57,8 @@ def get_notification_manager() -> NotificationManagerService:
 @lru_cache(maxsize=1)
 def get_rag_service() -> RAGServiceBase:
     """Get RAG service instance."""
+    if settings.rag_echo_enabled:
+        return EchoRAGService()
     return HTTPRAGService(
         endpoint_url=settings.rag_endpoint_url,
         max_connections=100,