Update app.py

app.py

@@ -122,6 +122,7 @@ def flush_memory():
 
 # ── Worker loop ───────────────────────────────────────────────────────────────
 def worker_loop():
+    os.makedirs(OUT_DIR, exist_ok=True)
     print(f"✓ [{WORKER_ID}] Loading tokenizer...")
     tok = Tokenizer.from_file(TOK_PATH)
     print(f"✓ [{WORKER_ID}] Tokenizer ready | vocab: {tok.get_vocab_size():,}")