Trigger StatusHashtag observer on deletion to keep cached_count accurate

app/Jobs/DeletePipeline/DeleteAccountPipeline.php

@@ -155,7 +155,9 @@ class DeleteAccountPipeline implements ShouldQueue
         MediaTag::whereProfileId($id)->delete();
         Bookmark::whereProfileId($id)->forceDelete();
         EmailVerification::whereUserId($user->id)->forceDelete();
-        StatusHashtag::whereProfileId($id)->delete();
+        // Model-based delete so StatusHashtagObserver::deleted() runs and
+        // decrements hashtags.cached_count (a query-builder delete bypasses it).
+        StatusHashtag::whereProfileId($id)->get()->each->delete();
         DirectMessage::whereFromId($id)->orWhere('to_id', $id)->delete();
         Conversation::whereFromId($id)->orWhere('to_id', $id)->delete();
         StatusArchived::whereProfileId($id)->delete();

app/Jobs/DeletePipeline/DeleteRemoteStatusPipeline.php

@@ -95,7 +95,9 @@ class DeleteRemoteStatusPipeline implements ShouldQueue
             });
             Mention::whereStatusId($status->id)->forceDelete();
             Report::whereObjectType(Status::class)->whereObjectId($status->id)->delete();
-            StatusHashtag::whereStatusId($status->id)->delete();
+            // Model-based delete so StatusHashtagObserver::deleted() runs and
+            // decrements hashtags.cached_count (a query-builder delete bypasses it).
+            StatusHashtag::whereStatusId($status->id)->get()->each->delete();
             StatusView::whereStatusId($status->id)->delete();
             Status::whereReblogOfId($status->id)->forceDelete();
             $status->forceDelete();

app/Jobs/StatusPipeline/RemoteStatusDelete.php

@@ -179,7 +179,9 @@ class RemoteStatusDelete implements ShouldBeUniqueUntilProcessing, ShouldQueue
             ->whereObjectId($status->id)
             ->delete();
         StatusArchived::whereStatusId($status->id)->delete();
-        StatusHashtag::whereStatusId($status->id)->delete();
+        // Model-based delete so StatusHashtagObserver::deleted() runs and
+        // decrements hashtags.cached_count (a query-builder delete bypasses it).
+        StatusHashtag::whereStatusId($status->id)->get()->each->delete();
         StatusView::whereStatusId($status->id)->delete();
         Status::whereInReplyToId($status->id)->update(['in_reply_to_id' => null]);
 

app/Jobs/StatusPipeline/StatusDelete.php

@@ -165,7 +165,9 @@ class StatusDelete implements ShouldQueue
             ->delete();
 
         StatusArchived::whereStatusId($status->id)->delete();
-        StatusHashtag::whereStatusId($status->id)->delete();
+        // Model-based delete so StatusHashtagObserver::deleted() runs and
+        // decrements hashtags.cached_count (a query-builder delete bypasses it).
+        StatusHashtag::whereStatusId($status->id)->get()->each->delete();
         StatusView::whereStatusId($status->id)->delete();
         Status::whereInReplyToId($status->id)->update(['in_reply_to_id' => null]);
 

tests/Feature/StatusHashtagCachedCountTest.php

@@ -0,0 +1,52 @@
+<?php
+
+use App\Models\Hashtag;
+use App\Models\StatusHashtag;
+use Illuminate\Foundation\Testing\LazilyRefreshDatabase;
+use Illuminate\Support\Facades\Event;
+
+uses(LazilyRefreshDatabase::class);
+
+/*
+|--------------------------------------------------------------------------
+| StatusHashtag model-delete fires observer
+|--------------------------------------------------------------------------
+|
+| Deleting status_hashtags during status/account deletion must fire the
+| eloquent "deleted" event so StatusHashtagObserver decrements
+| hashtags.cached_count. A query-builder ->delete() bypasses the event;
+| ->get()->each->delete() (the fix) fires it per row.
+|
+*/
+
+function seedStatusHashtag(): StatusHashtag
+{
+    $hashtag = Hashtag::create(['name' => 'sunset', 'slug' => 'sunset']);
+
+    return StatusHashtag::create([
+        'status_id' => 900000000000000001,
+        'hashtag_id' => $hashtag->id,
+        'profile_id' => 123,
+        'status_visibility' => 'public',
+    ]);
+}
+
+it('fires the model deleted event for a model-based delete (the fix)', function () {
+    seedStatusHashtag();
+
+    Event::fake();
+
+    StatusHashtag::whereStatusId(900000000000000001)->get()->each->delete();
+
+    Event::assertDispatched('eloquent.deleted: '.StatusHashtag::class);
+});
+
+it('does not fire the model deleted event for a query-builder delete (the bug)', function () {
+    seedStatusHashtag();
+
+    Event::fake();
+
+    StatusHashtag::whereStatusId(900000000000000001)->delete();
+
+    Event::assertNotDispatched('eloquent.deleted: '.StatusHashtag::class);
+});