Constant DEFAULT_UPDATE_INTERVAL_SECS 

pub const DEFAULT_UPDATE_INTERVAL_SECS: u64 = 3_600; // 3_600u64

C++ fallback interval in OMEvProc_OvernightWhiteList when backend does not provide a usable update_interval. C++ fallback interval when CMD20874 does not return a positive interval. Ref: GTWCmdAndPushReply.cpp:1752-1765.