feat: Phase 5.2 - Global Search with Laravel Scout

- Install laravel/scout with database driver
- Add Searchable trait to Feature, Issue, Task, Inspection models
- Create GlobalSearch Livewire component with Blade view
- Configure scout.php for database driver + queued syncing
- Add SCOUT_DRIVER=database to .env.example

Tests: 101 passing (319 assertions)

app/Models/Feature.php

@@ -7,10 +7,11 @@ use Carbon\Carbon;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\MorphMany;
 use Illuminate\Database\Eloquent\SoftDeletes;
+use Laravel\Scout\Searchable;
 
 class Feature extends Model
 {
-    use LogsActivity, SoftDeletes;
+    use LogsActivity, SoftDeletes, Searchable;
 
     const STATUSES = ['planned', 'started', 'in_progress', 'completed', 'verified'];
 
@@ -156,4 +157,23 @@ class Feature extends Model
 
         return $spi >= 0.95;
     }
+
+    public function toSearchableArray(): array
+    {
+        return [
+            'id' => $this->id,
+            'name' => $this->name,
+            'description' => $this->description,
+            'project_id' => $this->layer->phase->project_id ?? null,
+            'phase_id' => $this->layer->phase_id ?? null,
+            'layer_id' => $this->layer_id ?? null,
+            'status' => $this->status,
+            'progress' => $this->progress,
+        ];
+    }
+
+    public function getScoutKey(): string
+    {
+        return (string) $this->id;
+    }
 }