Makes EMP logs less bad (#93841)

## About The Pull Request

closes #93805

## Why It's Good For The Game

we actually have almost no emp logging at all lol, not even emp chem
reaction, so you barely can track potential griefer?

## Changelog

🆑
admin: EMP logs are improved, additionally chemical EMP reactions are
now logged.
/🆑

code/modules/atmospherics/machinery/components/fusion/hfr_procs.dm

@@ -560,7 +560,7 @@
 			epicenter = loc,
 			heavy_range = critical ? emp_heavy_size * 2 : emp_heavy_size,
 			light_range = critical ? emp_light_size * 2 : emp_heavy_size,
-			log = TRUE
+			emp_source = src
 			)
 
 	qdel(src)