refactor: use GarbageCollector prefix for GC console command classes

Rename the internal garbage collector commands to a consistent
GarbageCollector* naming scheme (file + class). Command signatures are
unchanged, so the scheduler and cron entries are unaffected.

- MediaGarbageCollector          -> GarbageCollectorMedia
- DatabaseSessionGarbageCollector -> GarbageCollectorDatabaseSession
- FailedJobGC                    -> GarbageCollectorFailedJob
- PasswordResetGC                -> GarbageCollectorPasswordReset
- GCRemcache                     -> GarbageCollectorRemcache
- StoryGC                        -> GarbageCollectorStory
- ImportUploadGarbageCollection  -> GarbageCollectorImportUpload

app/Console/Commands/Internal/GarbageCollectorDatabaseSession.php

@@ -5,7 +5,7 @@ namespace App\Console\Commands\Internal;
 use Illuminate\Console\Command;
 use Illuminate\Support\Facades\DB;
 
-class DatabaseSessionGarbageCollector extends Command
+class GarbageCollectorDatabaseSession extends Command
 {
     /**
      * The name and signature of the console command.

app/Console/Commands/Internal/GarbageCollectorFailedJob.php

@@ -5,7 +5,7 @@ namespace App\Console\Commands\Internal;
 use App\Models\FailedJob;
 use Illuminate\Console\Command;
 
-class FailedJobGC extends Command
+class GarbageCollectorFailedJob extends Command
 {
     /**
      * The name and signature of the console command.

app/Console/Commands/Internal/GarbageCollectorImportUpload.php

@@ -6,7 +6,7 @@ use App\Models\ImportPost;
 use App\Services\ImportService;
 use Illuminate\Console\Command;
 
-class ImportUploadGarbageCollection extends Command
+class GarbageCollectorImportUpload extends Command
 {
     /**
      * The name and signature of the console command.

app/Console/Commands/Internal/GarbageCollectorMedia.php

@@ -6,7 +6,7 @@ use App\Models\Media;
 use App\Services\MediaStorageService;
 use Illuminate\Console\Command;
 
-class MediaGarbageCollector extends Command
+class GarbageCollectorMedia extends Command
 {
     /**
      * The name and signature of the console command.

app/Console/Commands/Internal/GarbageCollectorPasswordReset.php

@@ -5,7 +5,7 @@ namespace App\Console\Commands\Internal;
 use App\Models\EmailVerification;
 use Illuminate\Console\Command;
 
-class PasswordResetGC extends Command
+class GarbageCollectorPasswordReset extends Command
 {
     /**
      * The name and signature of the console command.

app/Console/Commands/Internal/GarbageCollectorRemcache.php

@@ -4,7 +4,7 @@ namespace App\Console\Commands\Internal;
 
 use Illuminate\Console\Command;
 
-class GCRemcache extends Command
+class GarbageCollectorRemcache extends Command
 {
     /**
      * The name and signature of the console command.

app/Console/Commands/Internal/GarbageCollectorStory.php

@@ -8,7 +8,7 @@ use App\Models\Story;
 use App\Services\StoryService;
 use Illuminate\Console\Command;
 
-class StoryGC extends Command
+class GarbageCollectorStory extends Command
 {
     /**
      * The name and signature of the console command.