Repair: copy legacy joinDate into new user's created_at when creating users from legacy wallz

app/Services/Messaging/ConversationDeltaService.php

@@ -0,0 +1,31 @@
+<?php
+
+namespace App\Services\Messaging;
+
+use App\Models\Conversation;
+use App\Models\Message;
+use App\Models\User;
+use Illuminate\Support\Collection;
+
+class ConversationDeltaService
+{
+    public function __construct(
+        private readonly MessagingPayloadFactory $payloadFactory,
+    ) {}
+
+    public function messagesAfter(Conversation $conversation, User $viewer, int $afterMessageId, ?int $limit = null): Collection
+    {
+        $maxMessages = max(1, (int) config('messaging.recovery.max_messages', 100));
+        $effectiveLimit = min($limit ?? $maxMessages, $maxMessages);
+
+        return Message::withTrashed()
+            ->where('conversation_id', $conversation->id)
+            ->where('id', '>', $afterMessageId)
+            ->with(['sender:id,username,name', 'reactions', 'attachments'])
+            ->orderBy('id')
+            ->limit($effectiveLimit)
+            ->get()
+            ->map(fn (Message $message) => $this->payloadFactory->message($message, (int) $viewer->id))
+            ->values();
+    }
+}