feat: WS ACK + 8KB chunks (below kube-vip 50KB threshold), bump 1.0.21

site/app.py

@@ -6,7 +6,7 @@ from flask_sock import Sock
 app = Flask(__name__)
 sock = Sock(app)
 
-VERSION = '1.0.20'
+VERSION = '1.0.21'
 
 
 @app.route('/')
@@ -21,7 +21,7 @@ def health():
 
 @sock.route('/ws-upload')
 def ws_upload(ws):
-    """WebSocket: получает чанки, считает байты и время"""
+    """WebSocket: получает чанки, ACK после каждого"""
     t0 = time.time()
     total = 0
     while True:
@@ -31,6 +31,7 @@ def ws_upload(ws):
         if isinstance(chunk, str) and chunk == 'DONE':
             break
         total += len(chunk)
+        ws.send(json.dumps({'ack': total}))
     elapsed = round((time.time() - t0) * 1000)
     ws.send(json.dumps({'ok': True, 'bytes': total, 'elapsed_ms': elapsed}))