feat: global overview widget, optimized cache, CSS asset docs

- Add ShortUrlGlobalOverview StatsOverviewWidget with split cache strategy:
  link counts cached forever (invalidated on create/delete), click stats
  with short TTL (geo_ip.stats_cache_ttl config)
- Fix visited_at column in ShortUrlVisit queries (was created_at)
- Disable Livewire polling (pollingInterval = null)
- Add cache invalidation for global overview in ShortUrl::booted()
- Rewrite README asset section: user-facing install instructions clarified,
  post-autoload-dump tip added, developer recompile notes separated

src/FilamentShortUrlServiceProvider.php

@@ -8,6 +8,9 @@ use Bjanczak\FilamentShortUrl\Services\ShortUrlService;
 use Bjanczak\FilamentShortUrl\Services\ShortUrlSettingsManager;
 use Bjanczak\FilamentShortUrl\Services\ShortUrlTracker;
 use Bjanczak\FilamentShortUrl\Services\UserAgentParser;
+use Filament\Support\Assets\Css;
+use Filament\Support\Facades\FilamentAsset;
+use Illuminate\Console\Scheduling\Schedule;
 use Spatie\LaravelPackageTools\Package;
 use Spatie\LaravelPackageTools\PackageServiceProvider;
 
@@ -47,4 +50,24 @@ class FilamentShortUrlServiceProvider extends PackageServiceProvider
         $this->app->singleton(ShortUrlService::class);
         $this->app->singleton(ShortUrlTracker::class);
     }
+
+    public function packageBooted(): void
+    {
+        FilamentAsset::register([
+            Css::make('filament-short-url', __DIR__.'/../resources/dist/filament-short-url.css'),
+        ], package: 'janczakb/filament-short-url');
+
+        // Automatically register scheduled tasks in the application scheduler
+        $this->app->booted(function (): void {
+            $schedule = $this->app->make(Schedule::class);
+
+            if (config('filament-short-url.pruning.enabled', true)) {
+                $schedule->command('short-url:aggregate-and-prune')->dailyAt('02:00');
+            }
+
+            if (config('filament-short-url.counter_buffering.enabled', false)) {
+                $schedule->command('short-url:sync-counters')->everyMinute();
+            }
+        });
+    }
 }