feat: Implement ChickenObserver to clear active chickens cache on model changes and register it with the Chicken model.

app/Models/Chicken.php

@@ -3,10 +3,13 @@
 namespace App\Models;
 
 use App\Enums\ChickenStatus;
+use App\Observers\ChickenObserver;
+use Illuminate\Database\Eloquent\Attributes\ObservedBy;
 use Illuminate\Database\Eloquent\Factories\HasFactory;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\SoftDeletes;
 
+#[ObservedBy([ChickenObserver::class])]
 class Chicken extends Model
 {
     use HasFactory, SoftDeletes;

app/Observers/ChickenObserver.php

@@ -0,0 +1,57 @@
+<?php
+
+namespace App\Observers;
+
+use App\Models\Chicken;
+use Illuminate\Support\Facades\Cache;
+
+class ChickenObserver
+{
+    /**
+     * Handle events after any change that should invalidate chicken cache.
+     */
+    protected function clearChickenCache(): void
+    {
+        Cache::store('redis')->forget('active_chickens_for_egg_collection_form');
+    }
+
+    /**
+     * Handle the Chicken "created" event.
+     */
+    public function created(Chicken $chicken): void
+    {
+        $this->clearChickenCache();
+    }
+
+    /**
+     * Handle the Chicken "updated" event.
+     */
+    public function updated(Chicken $chicken): void
+    {
+        $this->clearChickenCache();
+    }
+
+    /**
+     * Handle the Chicken "deleted" event.
+     */
+    public function deleted(Chicken $chicken): void
+    {
+        $this->clearChickenCache();
+    }
+
+    /**
+     * Handle the Chicken "restored" event.
+     */
+    public function restored(Chicken $chicken): void
+    {
+        $this->clearChickenCache();
+    }
+
+    /**
+     * Handle the Chicken "force deleted" event.
+     */
+    public function forceDeleted(Chicken $chicken): void
+    {
+        $this->clearChickenCache();
+    }
+}