This MR is to include references in the hanconfig file for HLT egamma signature. A dedicated reference for HLT Egamma was provided using the reprocessing ATR-25952, that contain some fix for our signature .
Discussions about updates for hanconfig - JIRA Ticket: ATR-25504
The HIST file used as reference was store here: /eos/atlas/atlascerngroupdisk/trig-egam/Hanconfig/reference/ATR-25952/
Webdiplay generated for test: https://atlasdqm.cern.ch/webdisplay/test/250711/zee_360026/run_360026/run/HLT/TREG/Shifter/Distributions/HLT/HLT_e20_lhtight_L1EM15VH/