Build 2602261605: invite trace and cross-system user lifecycle

backend/app/clients/base.py

@@ -41,3 +41,14 @@ class ApiClient:
             if not response.content:
                 return None
             return response.json()
+
+    async def delete(self, path: str) -> Optional[Any]:
+        if not self.base_url:
+            return None
+        url = f"{self.base_url}{path}"
+        async with httpx.AsyncClient(timeout=10.0) as client:
+            response = await client.delete(url, headers=self.headers())
+            response.raise_for_status()
+            if not response.content:
+                return None
+            return response.json()