feat: add websocket endpoint for fal

fal_app.py

@@ -1,5 +1,6 @@
 import io
 import fal
+from fastapi import WebSocket
 import torch
 from fal.toolkit import File
 
@@ -33,3 +34,16 @@ def run(self):
             serialized.append(buf.getvalue())
 
         return serialized
+
+    @fal.endpoint("/ws")
+    async def run_ws(self, ws: WebSocket):
+        await ws.accept()
+
+        wav = self.model.generate(PROMPTS)
+
+        for one_wav in enumerate(wav):
+            buf = io.BytesIO()
+            torch.save(one_wav, buf)
+            await ws.send_bytes(buf.getvalue())
+
+        await ws.close()