Adds the message server key to the Chief Engineer's memories. (#80063)

## About The Pull Request
Like the captain has innate knowledge of the golden safe code, the Chief
Engineer should know the daily key of the message server.

## Why It's Good For The Game
It's a perk of the job.

## Changelog

🆑
add: Added the daily (roundstart) message server key to the Chief
Engineer's memories.
/🆑

---------

Co-authored-by: distributivgesetz <distributivgesetz93@gmail.com>

code/datums/memory/key_memories.dm

@@ -213,3 +213,26 @@
 		"[protagonist_name] being arrested by security for [crimes].",
 		"[protagonist_name] committing the crimes of [crimes].",
 	)
+
+/datum/memory/key/message_server_key
+	var/decrypt_key
+
+/datum/memory/key/message_server_key/New(
+	datum/mind/memorizer_mind,
+	atom/protagonist,
+	atom/deuteragonist,
+	atom/antagonist,
+	decrypt_key,
+)
+	src.decrypt_key = decrypt_key
+	return ..()
+
+/datum/memory/key/message_server_key/get_names()
+	return list("The daily message server key is [decrypt_key]. Keep it a secret from the clown.")
+
+/datum/memory/key/message_server_key/get_starts()
+	return list(
+		"A sticky note attached to a monitor with [decrypt_key] written on it.",
+		"Poly the parrot screaming \"[decrypt_key]!\" over and over again.",
+		"[protagonist_name] spilling coffee over the message monitor while typing [decrypt_key].",
+	)