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)

composer.json

@@ -12,6 +12,7 @@
         "laravel/framework": "^12.0",
         "laravel/reverb": "^1.11",
         "laravel/sanctum": "^4.3",
+        "laravel/scout": "^11.6",
         "laravel/tinker": "^2.10.1",
         "league/geotools": "^1.3",
         "livewire/livewire": "^3.6.4",