Macro insert_optional_fields 

macro_rules! insert_optional_fields {
    ($detail:expr, $source:expr, {
        $($key:literal => $field:ident),* $(,)?
    }) => { ... };
}

Insert optional fields from a struct into a HashMap if they exist. Skips None values automatically. Optimized to avoid redundant allocations for static strings.

Example usage:

insert_optional_fields!(detail, static_info, {
    "PCIe Address" => pcie_address,
    "PCIe Vendor ID" => pcie_vendor_id,
    "PCIe Device ID" => pcie_device_id
});