fix adv upload

main.py

@@ -8,6 +8,7 @@ import os
 import re
 import json
 import io
+import socket
 import stat as stat_mod
 import time
 from datetime import datetime
@@ -112,6 +113,7 @@ ADV_SFTP_PORT = int(os.getenv("ADV_SFTP_PORT", "22"))
 ADV_SFTP_USER = os.getenv("ADV_SFTP_USER", "fssservice")
 ADV_SFTP_PASSWORD = os.getenv("ADV_SFTP_PASSWORD", "")
 ADV_SFTP_REMOTE_DIR = os.getenv("ADV_SFTP_REMOTE_DIR")
+ADV_SFTP_CONNECT_TIMEOUT = float(os.getenv("ADV_SFTP_CONNECT_TIMEOUT", "10"))
 
 # Per-country SFTP overrides. Each country can target a different host.
 # JSON map keyed by lowercase country code; any omitted field falls back to the
@@ -183,10 +185,19 @@ def open_adv_sftp(cfg: dict):
         raise HTTPException(500, f"ADV SFTP remote_dir not configured for host {cfg.get('host')}")
     if not cfg.get("password"):
         raise HTTPException(500, f"ADV SFTP password not configured for host {cfg.get('host')}")
-    transport = paramiko.Transport((cfg["host"], cfg["port"]))
+    print(
+        f"[ADV SFTP] Connecting to {cfg['host']}:{cfg['port']} "
+        f"as {cfg['user']} (timeout={ADV_SFTP_CONNECT_TIMEOUT}s)",
+        flush=True
+    )
+    sock = socket.create_connection((cfg["host"], cfg["port"]), timeout=ADV_SFTP_CONNECT_TIMEOUT)
+    transport = paramiko.Transport(sock)
+    transport.banner_timeout = ADV_SFTP_CONNECT_TIMEOUT
+    transport.auth_timeout = ADV_SFTP_CONNECT_TIMEOUT
     _enable_legacy_ssh(transport)
     transport.connect(username=cfg["user"], password=cfg["password"])
     sftp = paramiko.SFTPClient.from_transport(transport)
+    print(f"[ADV SFTP] Connected to {cfg['host']}:{cfg['port']}", flush=True)
     return transport, sftp
 
 def sftp_ensure_dir(sftp, remote_dir: str):