Use uint64_t for rotation periods

include/mtx/events/encryption.hpp

@@ -23,10 +23,10 @@ struct Encryption
         std::string algorithm = "m.megolm.v1.aes-sha2";
         //! How long the session should be used before changing it. 604800000 (a week) is the
         //! recommended default.
-        int rotation_period_ms = 604800000;
+        uint64_t rotation_period_ms = 604800000;
         //! How many messages should be sent before changing the session. 100 is the recommended
         //! default.
-        int rotation_period_msgs = 100;
+        uint64_t rotation_period_msgs = 100;
 };
 
 void

lib/structs/events/encryption.cpp

@@ -12,9 +12,9 @@ from_json(const nlohmann::json &obj, Encryption &encryption)
         encryption.algorithm = obj.at("algorithm").get<std::string>();
 
         if (obj.contains("rotation_period_ms"))
-                encryption.rotation_period_ms = obj.at("rotation_period_ms").get<int>();
+                encryption.rotation_period_ms = obj.at("rotation_period_ms").get<uint64_t>();
         if (obj.contains("rotation_period_msgs"))
-                encryption.rotation_period_msgs = obj.at("rotation_period_msgs").get<int>();
+                encryption.rotation_period_msgs = obj.at("rotation_period_msgs").get<uint64_t>();
 }
 
 void