message: Mark Structure std::map data tables as const
diff: /**
  * Translation table for Structure States.
  */
  -std::map<StructureState, std::string> STRUCTURE_STATE_TRANSLATION =
  +const std::map<StructureState, std::string> STRUCTURE_STATE_TRANSLATION =
  {
  { StructureState::UnderConstruction, "Under Construction" },
  { StructureState::Operational, "Operational" },
  @@ -22,7 +22,7 @@ std::map<StructureState, std::string> STRUCTURE_STATE_TRANSLATION =
  /**
  * Translation table for Structure Classes.
  */
  -std::map<Structure::StructureClass, std::string> STRUCTURE_CLASS_TRANSLATION =
  +const std::map<Structure::StructureClass, std::string> STRUCTURE_CLASS_TRANSLATION =
  {
  { Structure::StructureClass::Command, "Command" },
  { Structure::StructureClass::Communication, "Communication" },
  