Investigate logs include ckey of source (if applicable) (#71833)

## About The Pull Request
All investigate logs start with [src], which can be any atom. So
sometimes names and items get printed twice. Adds ckeys to the
investigate_logs of living mobs.


![image](https://user-images.githubusercontent.com/66640614/206372340-3c50bc9d-b662-4a4d-b1ec-91c0b4db8a39.png)


## Why It's Good For The Game
Better logging, includes the ckey for living mobs in investigate logs,
and fixes some investigate_death logs that weren't properly attributed
to mobs.

## Changelog

🆑 Tattle
admin: investigate logs include ckey of source (if applicable)
/🆑

Co-authored-by: tattle <article.disaster@gmail.com>

code/datums/components/singularity.dm

@@ -323,7 +323,7 @@
 	var/turf/spawned_turf = get_turf(parent)
 	message_admins("A singulo has been created at [ADMIN_VERBOSEJMP(spawned_turf)].")
 	var/atom/atom_parent = parent
-	atom_parent.investigate_log("was made a singularity at [AREACOORD(spawned_turf)].", INVESTIGATE_ENGINE)
+	atom_parent.investigate_log("was made into a singularity at [AREACOORD(spawned_turf)].", INVESTIGATE_ENGINE)
 
 /// Fired when the singularity is fired at with the BSA and deletes it
 /datum/component/singularity/proc/bluespace_reaction()