fix(freeradius): return the created entry's remote id from create_radius_*

add_client/add_user's response carries no id, so create_radius_client()
and create_radius_user() now look the new entry up via
get_radius_clients()/get_radius_users() (matched by name/username)
immediately after creation. Callers need this id to address the entry in
later set_*/del_* calls -- without it there was no way to store a
reference to what was just created.

napalm_opnsense/opnsense.py

@@ -1144,13 +1144,17 @@ class OPNsenseDriver(FirewallDriver):
         Calls ``POST /api/freeradius/client/add_client``, then
         ``POST /api/freeradius/service/reconfigure`` to apply -- a saved
         client has no effect on the running radiusd until reconfigured.
+        The add response carries no id, so the new client's uuid is looked
+        up afterwards via get_radius_clients() (matched by name) -- callers
+        need it to address this client in later set_client/del_client calls.
         """
         payload = {"client": {"name": name, "ip": ip, "secret": secret}}
         result = self._post("/api/freeradius/client/add_client", payload)
         if result.get("result") != "saved":
             return {"success": False, "validations": result.get("validations", {})}
         self._post("/api/freeradius/service/reconfigure")
-        return {"success": True}
+        created = next((c for c in self.get_radius_clients() if c["name"] == name), None)
+        return {"success": True, "id": created["id"] if created else None}
 
     def delete_radius_client(self, client_id: str) -> dict[str, Any]:
         """Delete a FreeRADIUS NAS client by uuid and apply the change."""
@@ -1184,14 +1188,18 @@ class OPNsenseDriver(FirewallDriver):
         """Create a FreeRADIUS user and apply the change.
 
         Calls ``POST /api/freeradius/user/add_user``, then
-        ``POST /api/freeradius/service/reconfigure`` to apply.
+        ``POST /api/freeradius/service/reconfigure`` to apply. The add
+        response carries no id, so the new user's uuid is looked up
+        afterwards via get_radius_users() (matched by username) -- callers
+        need it to address this user in later set_user/del_user calls.
         """
         payload = {"user": {"username": username, "password": password}}
         result = self._post("/api/freeradius/user/add_user", payload)
         if result.get("result") != "saved":
             return {"success": False, "validations": result.get("validations", {})}
         self._post("/api/freeradius/service/reconfigure")
-        return {"success": True}
+        created = next((u for u in self.get_radius_users() if u["username"] == username), None)
+        return {"success": True, "id": created["id"] if created else None}
 
     def delete_radius_user(self, user_id: str) -> dict[str, Any]:
         """Delete a FreeRADIUS user by uuid and apply the change."""