adjust registered by to managed by on db aslo remove url and api key on adding sites for gm

backend/apps/farms/services/active_site_registry.py

@@ -18,9 +18,9 @@ def ensure_hq_site_for_active_site(active_site: ActiveSite) -> Site:
     if existing:
         return existing
 
-    owner = active_site.registered_by
+    owner = active_site.managed_by
     if owner is None:
-        raise ValueError("ActiveSite.registered_by is required to create an HQ site.")
+        raise ValueError("ActiveSite.managed_by is required to create an HQ site.")
 
     site_name = (active_site.name or active_site.code or "Site")[:30]
     orphan = (