Log enrichment: Explosion damage to players (#29762)

* Log enrichment: Explosion damage to players

* Update Content.Server/Explosion/EntitySystems/ExplosionSystem.Processing.cs

Co-authored-by: Chief-Engineer <119664036+Chief-Engineer@users.noreply.github.com>

* Revert to total damage variant only, currently serialised as string.

* Make this its own log type.

---------

Co-authored-by: Chief-Engineer <119664036+Chief-Engineer@users.noreply.github.com>

Content.Shared.Database/LogType.cs

@@ -115,4 +115,10 @@ public enum LogType
     /// Storage & entity-storage related interactions
     /// </summary>
     Storage = 93,
+    
+    /// <summary>
+    /// A player got hit by an explosion and was dealt damage.
+    /// </summary>
+    ExplosionHit = 94,
+
 }