Roundstart variation game rules (#24397)

* Raise `StationPostInitEvent` broadcast

* Basic variation pass handling

* standardize names + rule entities

* why does it work like that?

* add to defaults

* light break variation pass

* ent spawn entry

* move some stationevent utility functions to gamerule + add one for finding random tile on specified station

* forgot how statistics works

* powered light variation pass is good now

* station tile count function

* public method to ensure all solutions (for procedural use before mapinit)

* move gamerulesystem utility funcs to partial

* ensure all solutions before spilling in puddlesystem. for use when spilling before mapinit

* trash & puddle variation passes!

* oh yeah

* ehh lets live a little

* std

* utility for game rule check based on comp

* entprotoid the trash spawner oops

* generalize trash variation

* use added instead of started for secret rule

* random cleanup

* generic replacement variation system

* Wall rusting variation rule

* account for modifying while enumerating

* use localaabb

* fix test

* minor tweaks

* reinforced wall replacer + puddletweaker

(cherry picked from commit cc24ba6a31)

Content.Server/GameTicking/Rules/SecretRuleSystem.cs

@@ -18,9 +18,9 @@ public sealed class SecretRuleSystem : GameRuleSystem<SecretRuleComponent>
     [Dependency] private readonly IConfigurationManager _configurationManager = default!;
     [Dependency] private readonly IAdminLogManager _adminLogger = default!;
 
-    protected override void Started(EntityUid uid, SecretRuleComponent component, GameRuleComponent gameRule, GameRuleStartedEvent args)
+    protected override void Added(EntityUid uid, SecretRuleComponent component, GameRuleComponent gameRule, GameRuleAddedEvent args)
     {
-        base.Started(uid, component, gameRule, args);
+        base.Added(uid, component, gameRule, args);
         PickRule(component);
     }
 
@@ -40,13 +40,24 @@ public sealed class SecretRuleSystem : GameRuleSystem<SecretRuleComponent>
         // but currently there's no way to know anyway as they use cvars.
         var presetString = _configurationManager.GetCVar(CCVars.SecretWeightPrototype);
         var preset = _prototypeManager.Index<WeightedRandomPrototype>(presetString).Pick(_random);
-        Logger.InfoS("gamepreset", $"Selected {preset} for secret.");
+        Log.Info($"Selected {preset} for secret.");
         _adminLogger.Add(LogType.EventStarted, $"Selected {preset} for secret.");
 
         var rules = _prototypeManager.Index<GamePresetPrototype>(preset).Rules;
         foreach (var rule in rules)
         {
-            GameTicker.StartGameRule(rule, out var ruleEnt);
+            EntityUid ruleEnt;
+
+            // if we're pre-round (i.e. will only be added)
+            // then just add rules. if we're added in the middle of the round (or at any other point really)
+            // then we want to start them as well
+            if (GameTicker.RunLevel <= GameRunLevel.InRound)
+                ruleEnt = GameTicker.AddGameRule(rule);
+            else
+            {
+                GameTicker.StartGameRule(rule, out ruleEnt);
+            }
+
             component.AdditionalGameRules.Add(ruleEnt);
         }
     }