Misc Atmos Improvements (#5613)

* Revert "Remove atmos archiving."

This reverts commit 7fa10bd17b.

* Explosive Depressurization now brings tiles down to TCMB.

* Tiles now specify heat capacity.

* Do not serialize archived gas mixture values.

* Remove bad idea

* dumb typo

* Space gas mixtures now have a harcoded heat capacity.
This is a bit of a hack, but rooms exposed to space now cool down properly when monstermos is disabled.
Huge thanks to @LemonInTheDark for helping me with this!

* Clean up heat capacity methods

* Better logging based on the original monstermos' logging

* Comment explosive depressurization hack better

Content.Server/Atmos/TileAtmosphere.cs

@@ -13,12 +13,18 @@ namespace Content.Server.Atmos
     /// </summary>
     public class TileAtmosphere : IGasMixtureHolder
     {
+        [ViewVariables]
+        public int ArchivedCycle;
+
         [ViewVariables]
         public int CurrentCycle;
 
         [ViewVariables]
         public float Temperature { get; set; } = Atmospherics.T20C;
 
+        [ViewVariables]
+        public float TemperatureArchived { get; set; } = Atmospherics.T20C;
+
         [ViewVariables]
         public TileAtmosphere? PressureSpecificTarget { get; set; }
 
@@ -26,7 +32,7 @@ namespace Content.Server.Atmos
         public float PressureDifference { get; set; }
 
         [ViewVariables(VVAccess.ReadWrite)]
-        public float HeatCapacity { get; set; } = 1f;
+        public float HeatCapacity { get; set; } = Atmospherics.MinimumHeatCapacity;
 
         [ViewVariables]
         public float ThermalConductivity { get; set; } = 0.05f;