Function assign_internal 

pub fn assign_internal<T: Into<Stored>>(
    table_name: TableName,
    key: SymStr,
    value: T,
    scope: Option<Scope>,
)

assigns a Stored value at the given key and scope Direct mirror of Perl’s free-function form LaTeXML::Core::State::assign_internal($STATE, $table, $key, $value, $scope) (Core/State.pm L140). Bypasses every dialect / lock / let-chase / admission layer Rust has accreted on top of the table mutation; used by the dump loader (Core/Dumper.pm V/Cc/Mc/Sc/Lc/Uc/Dc/Im/I/Lt) so the dump replay matches Perl exactly: one record == one assign_internal call.