chore(v5): archive V5 implementation and remove runtime integration

Move V5 source, migrations, UI, scripts, and tests into documentation, then remove V5 routes, models, jobs, configuration, dependencies, and application hooks.

app/Providers/RouteServiceProvider.php

@@ -2,7 +2,6 @@
 
 namespace App\Providers;
 
-use App\Support\V5\V5Feature;
 use Illuminate\Cache\RateLimiting\Limit;
 use Illuminate\Foundation\Support\Providers\RouteServiceProvider as ServiceProvider;
 use Illuminate\Http\Request;
@@ -35,13 +34,6 @@ class RouteServiceProvider extends ServiceProvider
             Route::prefix('webhooks')
                 ->group(base_path('routes/webhooks.php'));
 
-            if (V5Feature::enabled()) {
-                Route::middleware('v5.web')
-                    ->prefix('v5')
-                    ->as('v5.')
-                    ->group(base_path('routes/v5.php'));
-            }
-
             Route::middleware('web')
                 ->group(base_path('routes/web.php'));
         });
@@ -63,12 +55,6 @@ class RouteServiceProvider extends ServiceProvider
             return Limit::perMinute(5)->by($request->user()?->id ?: $request->ip());
         });
 
-        if (V5Feature::enabled()) {
-            RateLimiter::for('v5', function (Request $request) {
-                return Limit::perMinute(120)->by($request->user()?->id ?: $request->ip());
-            });
-        }
-
         RateLimiter::for('feedback', function (Request $request) {
             return Limit::perMinute(3)->by($request->user()?->id ?: $request->ip());
         });