message: Add Structure::structureId() getter to Structure
diff: @@ -69,6 +69,8 @@ public:
  // STATES & STATE MANAGEMENT
  StructureState state() const { return mStructureState; }
  + StructureID structureId() const { return mStructureId; }
  +
  bool disabled() const { return mStructureState == StructureState::Disabled; }
  void disable(DisabledReason);
  DisabledReason disabledReason() const { return mDisabledReason; }
  @@ -182,7 +184,7 @@ private:
  int mMaxAge = 0; /**< Maximum number of turns the Structure can remain in good repair. */
  int mEnergyRequirement = 0;
  - StructureID mStructureID{ StructureID::SID_NONE };
  + StructureID mStructureId{ StructureID::SID_NONE };
  StructureState mStructureState = StructureState::UnderConstruction; /**< State the structure is in. */
  StructureClass mStructureClass; /**< Indicates the Structure's Type. */
  