session → chat Relation

File in src/session	Includes file in src/chat
session_coordinator.cpp	messages / services / message_processor.h
session_coordinator.cpp	messages / services / message_service.h
events / creator / wavelength_creator.cpp	messages / handler / message_handler.h
events / creator / wavelength_creator.cpp	messages / services / message_processor.h
events / joiner / wavelength_joiner.cpp	messages / handler / message_handler.h
events / joiner / wavelength_joiner.cpp	messages / services / message_processor.h
events / leaver / wavelength_leaver.cpp	messages / handler / message_handler.h