43a4256320
register_mcp_servers now nudges cached entries whose session is None via _signal_reconnect, so a new agent session recovers a parked server immediately instead of waiting up to _PARKED_RETRY_INTERVAL for the next self-probe (#50170). Gate-check idea credit: @izumi0uu (#50184), @LeonSGP43 (#37772), @Tranquil-Flow (#37899).