aiohttp request host_url include scheme fix

Author: p1c2u

openapi_core/contrib/aiohttp/requests.py

@@ -34,7 +34,7 @@ def __init__(self, request: web.Request, *, body: str | None):
 
     @property
     def host_url(self) -> str:
-        return self.request.url.host or ""
+        return f"{self.request.url.scheme}://{self.request.url.host}"
 
     @property
     def path(self) -> str: