RichDecodedData: Add constructor from SmartIDs

Rich/RichFutureMCUtils/src/component/DecodedDataFromMCRichHits.cpp

@@ -118,9 +118,7 @@ namespace Rich::Future::MC {
       for ( const auto id : ids ) { ri_debug( id, endmsg ); }
 
       // create, fill, and return decoded data structure
-      OutData data;
-      data.addSmartIDs( ids );
-      return data;
+      return OutData( ids );
     }
 
   private:

Rich/RichFutureUtils/include/RichFutureUtils/RichDecodedData.h

@@ -114,6 +114,9 @@ namespace Rich::Future::DAQ {
       }
     }
 
+    /// Constructor from SmartIDs
+    DecodedData( const LHCb::RichSmartID::Vector& ids ) : DecodedData() { addSmartIDs( ids ); }
+
   public:
     /// Returns the total number of hits in the decoded data for the given RICH detector
     [[nodiscard]] auto nTotalHits( const Rich::DetectorType rich ) const noexcept { return m_nTotalHits[rich]; }