Fix flammables air ignition (#23063)

* Fix welder ignition

* fix mobs on fire hotspot expose frequency

* fix shotgun pellets ignition

* ensure ignitionComp on flammable init

* \n

* Revert "ensure ignitionComp on flammable init"

This reverts commit 6915dcdc

Content.Server/Tools/ToolSystem.Welder.cs

@@ -1,5 +1,6 @@
 using System.Linq;
 using Content.Server.Chemistry.Components;
+using Content.Server.IgnitionSource;
 using Content.Server.Tools.Components;
 using Content.Shared.Chemistry.Components.SolutionManager;
 using Content.Shared.Database;
@@ -17,6 +18,7 @@ namespace Content.Server.Tools
     public sealed partial class ToolSystem
     {
         [Dependency] private readonly SharedItemToggleSystem _itemToggle = default!;
+        [Dependency] private readonly IgnitionSourceSystem _ignitionSource = default!;
         private readonly HashSet<EntityUid> _activeWelders = new();
 
         private const float WelderUpdateTimer = 1f;
@@ -68,6 +70,8 @@ namespace Content.Server.Tools
             // Logging
             _adminLogger.Add(LogType.InteractActivate, LogImpact.Low, $"{ToPrettyString(args.User):user} toggled {ToPrettyString(uid):welder} on");
 
+            _ignitionSource.SetIgnited(uid);
+
             if (transform.GridUid is { } gridUid)
             {
                 var position = _transformSystem.GetGridOrMapTilePosition(uid, transform);
@@ -84,6 +88,8 @@ namespace Content.Server.Tools
             // Logging
             _adminLogger.Add(LogType.InteractActivate, LogImpact.Low, $"{ToPrettyString(args.User):user} toggled {ToPrettyString(uid):welder} off");
 
+            _ignitionSource.SetIgnited(uid, false);
+
             Dirty(uid, welder);
 
             _activeWelders.Remove(uid);