Address SonarLint findings in Event class

include/ls-std/event/Event.hpp

@@ -3,7 +3,7 @@
  * Company:         Lynar Studios
  * E-Mail:          webmaster@lynarstudios.com
  * Created:         2020-11-26
- * Changed:         2023-02-22
+ * Changed:         2023-05-16
  *
  * */
 
@@ -29,8 +29,8 @@ namespace ls::std::event
 
       bool addParameter(const ls::std::core::type::event_parameter &_eventParameter); // nodiscard is optional here
       void clearParameterList();
-      [[nodiscard]] ls::std::core::type::event_id getId();
-      [[nodiscard]] ls::std::core::type::event_parameter_list getParameterList();
+      [[nodiscard]] ls::std::core::type::event_id getId() const;
+      [[nodiscard]] ls::std::core::type::event_parameter_list getParameterList() const;
       bool removeParameter(const ls::std::core::type::event_parameter_id &_id); // nodiscard is optional here
       void setId(const ls::std::core::type::event_id &_id);
 

source/ls-std/event/Event.cpp

@@ -3,7 +3,7 @@
  * Company:         Lynar Studios
  * E-Mail:          webmaster@lynarstudios.com
  * Created:         2020-11-26
- * Changed:         2023-02-23
+ * Changed:         2023-05-16
  *
  * */
 
@@ -42,12 +42,12 @@ void Event::clearParameterList()
   this->parameterList.clear();
 }
 
-event_id Event::getId()
+event_id Event::getId() const
 {
   return this->id;
 }
 
-event_parameter_list Event::getParameterList()
+event_parameter_list Event::getParameterList() const
 {
   return this->parameterList;
 }