Add live transcription progress and Docker Whisper.

Surface stage, percent, and elapsed time while jobs run, and ship Compose so local confidential transcription can use faster-whisper on port 8090.

app/Http/Controllers/TranscriptionStatusController.php

@@ -0,0 +1,17 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Models\Recording;
+use Illuminate\Http\JsonResponse;
+
+class TranscriptionStatusController extends Controller
+{
+    /**
+     * Live transcription progress for polling.
+     */
+    public function __invoke(Recording $recording): JsonResponse
+    {
+        return response()->json($recording->fresh()->transcriptionStatusPayload());
+    }
+}