Readds Sent from my PDA Sent from my PDA (#94302)

## About The Pull Request

PDA messages once again have a chance to say Sent from my PDA Sent from
my PDA

In the past it was a flat 1% chance going up to 25% chance if you were
over 30. But now I scaled it directly based on age (so the chance can
always go up) Sent from my PDA

## Why It's Good For The Game

I consider this a critical feature Sent from my PDA

## Changelog

🆑 Melbert
add: Readds Sent from my PDA Sent from my PDA
/🆑

code/modules/modular_computers/file_system/programs/messenger/messenger_program.dm

@@ -598,6 +598,13 @@
 	for(var/datum/computer_file/program/messenger/messenger as anything in targets)
 		stringified_targets += get_messenger_name(messenger)
 
+	var/sent_prob = 0
+	if(ishuman(source))
+		var/mob/living/carbon/human/oldie = source
+		sent_prob = (0.025 * oldie.age) ** 3 // 25 y/o = ~0.25% chance, 85 y/o = ~10% chance
+	if (computer && prob(sent_prob))
+		message = "[message] [computer.get_messenger_ending()]"
+
 	var/datum/signal/subspace/messaging/tablet_message/signal = new(computer, list(
 		"ref" = REF(src),
 		"message" = message,