Add Docker stack, Reverb live progress, and duplicate upload detection.

Ship FrankenPHP Compose services with Reverb WebSockets for real-time transcription status, skip re-uploading identical audio via content hash, and format disk usage without requiring intl.

app/Events/RecordingTranscriptionUpdated.php

@@ -0,0 +1,50 @@
+<?php
+
+namespace App\Events;
+
+use App\Models\Recording;
+use Illuminate\Broadcasting\Channel;
+use Illuminate\Broadcasting\InteractsWithSockets;
+use Illuminate\Contracts\Broadcasting\ShouldBroadcastNow;
+use Illuminate\Foundation\Events\Dispatchable;
+use Illuminate\Queue\SerializesModels;
+
+class RecordingTranscriptionUpdated implements ShouldBroadcastNow
+{
+    use Dispatchable, InteractsWithSockets, SerializesModels;
+
+    /**
+     * Create a new event instance.
+     */
+    public function __construct(public Recording $recording) {}
+
+    /**
+     * Get the channels the event should broadcast on.
+     *
+     * @return array<int, Channel>
+     */
+    public function broadcastOn(): array
+    {
+        return [
+            new Channel('recordings'),
+        ];
+    }
+
+    public function broadcastAs(): string
+    {
+        return 'RecordingTranscriptionUpdated';
+    }
+
+    /**
+     * @return array<string, mixed>
+     */
+    public function broadcastWith(): array
+    {
+        return array_merge(
+            $this->recording->transcriptionStatusPayload(),
+            [
+                'word_count' => $this->recording->word_count,
+            ],
+        );
+    }
+}