Fix tranq shells not injecting solution (#11254)

Content.Server/Weapon/Ranged/Systems/GunSystem.cs

@@ -103,6 +103,12 @@ public sealed partial class GunSystem : SharedGunSystem
                             shotProjectiles.Add(uid);
                         }
 
+                        //signal ChemicalAmmo to transfer solution
+                        RaiseLocalEvent(cartridge.Owner, new AmmoShotEvent()
+                        {
+                            FiredProjectiles = shotProjectiles,
+                        }, false);
+
                         SetCartridgeSpent(cartridge, true);
                         MuzzleFlash(gun.Owner, cartridge, user);
                         PlaySound(gun.Owner, gun.SoundGunshot?.GetSound(Random, ProtoManager), user);

Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Cartridges/shotgun.yml

@@ -131,5 +131,7 @@
     solution: ammo
   - type: SolutionTransfer
     maxTransferAmount: 15
+  - type: ExaminableSolution
+    solution: ammo
   - type: SpentAmmoVisuals
     state: "practice"

Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Projectiles/shotgun.yml

@@ -100,6 +100,7 @@
     solution: ammo
   - type: SolutionInjectOnCollide
     transferAmount: 15
+    blockSlots: NONE #tranquillizer darts shouldn't be blocked by a mask
   - type: InjectableSolution
     solution: ammo