Lag War 2: Revengeance (#21950)

<img width="750" height="449" alt="image"
src="https://github.com/user-attachments/assets/29c06609-eb62-42be-9b9c-334f9fe88636"
/>

Ports: tgstation/tgstation#75769, tgstation/tgstation#72572,
tgstation/tgstation#93054

Fixes the holodeck causing 800 trillion hard dels that brings the server
to its knees. Stops turrets, weather system, and overmap contacts from
generating 500+ timers every tick by just using vars instead.

---------

Signed-off-by: Wildkins <john.wildkins@gmail.com>

code/modules/mob/living/life.dm

@@ -220,7 +220,8 @@
 	// Handle physical effects of weather.
 	var/singleton/state/weather/weather_state
 	var/obj/abstract/weather_system/weather = get_affecting_weather()
-	if(weather)
+	if(weather_cooldown_time <= world.time && weather)
+		weather_cooldown_time = world.time + WEATHER_COOLDOWN_TIME
 		weather_state = weather.weather_system.current_state
 		if(istype(weather_state))
 			weather_state.handle_exposure(src, get_weather_exposure(weather), weather)

code/modules/mob/living/living_defines.dm

@@ -103,3 +103,6 @@
 
 	/// If true, ignores weather effects
 	var/resists_weather = FALSE
+
+	/// Time since last weather effect
+	var/weather_cooldown_time = 0