make params configurable

src/sd_bot.hpp

@@ -10,6 +10,7 @@
 #include <string>
 #include <memory>
 #include <optional>
+#include <random>
 
 // fwd
 struct ConfigModelI;
@@ -30,6 +31,8 @@ class SDBot : public RegistryMessageModelEventI {
 	std::unique_ptr<happyhttp::Connection> _con;
 	std::vector<uint8_t> _con_data;
 
+	std::default_random_engine _rng;
+
 	public:
 		SDBot(
 			Contact3Registry& cr,