fix(keenetic): preserve URL scheme/ports and IPv4 polling

Use web_url scheme and host:port for API base URL instead of
forcing https. Force IPv4 in aiohttp to avoid IPv6 hangs on
KeenDNS. Sync canonical 24-router list with Russian names.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/api/keenetic.py

@@ -309,7 +309,7 @@ async def keenetic_monitor_loop():
                         await _refresh_device(dev)
                     except Exception as e:
                         logger.error(f"Keenetic refresh {dev['name']}: {e}")
-                    await asyncio.sleep(2)
+                    await asyncio.sleep(3)
         except Exception as e:
             logger.error(f"Keenetic monitor loop error: {e}")