Improve timeout resilience for Telegram and n8n integrations.

Add configurable Telethon retry/connect settings, enable retry-on-fail for external n8n nodes, and document recovery steps for Telegram and workflow activation timeouts.

Co-authored-by: Cursor <cursoragent@cursor.com>

script.py

@@ -13,6 +13,12 @@ N8N_WEBHOOK_URL = os.getenv("N8N_WEBHOOK_URL", "http://n8n:5678/webhook/tg-inbox
 HISTORY_CHECK_FILE = os.getenv("HISTORY_CHECK_FILE", "/app/session/history_done.flag")
 SESSION_FILE_PATH = os.getenv("SESSION_FILE_PATH", "/app/session/session.session")
 SESSION_STRING = os.getenv("TG_SESSION_STRING", "")
+TG_USE_IPV6 = os.getenv("TG_USE_IPV6", "false").lower() in {"1", "true", "yes"}
+TG_CONNECT_TIMEOUT = int(os.getenv("TG_CONNECT_TIMEOUT", "20"))
+TG_REQUEST_RETRIES = int(os.getenv("TG_REQUEST_RETRIES", "10"))
+TG_CONNECTION_RETRIES = int(os.getenv("TG_CONNECTION_RETRIES", "20"))
+TG_RETRY_DELAY = int(os.getenv("TG_RETRY_DELAY", "5"))
+TG_RECONNECT_WAIT = int(os.getenv("TG_RECONNECT_WAIT", "15"))
 
 
 def load_session_string() -> str:
@@ -39,7 +45,17 @@ def validate_config() -> None:
 
 
 validate_config()
-client = TelegramClient(StringSession(load_session_string()), API_ID, API_HASH)
+client = TelegramClient(
+    StringSession(load_session_string()),
+    API_ID,
+    API_HASH,
+    use_ipv6=TG_USE_IPV6,
+    timeout=TG_CONNECT_TIMEOUT,
+    request_retries=TG_REQUEST_RETRIES,
+    connection_retries=TG_CONNECTION_RETRIES,
+    retry_delay=TG_RETRY_DELAY,
+    auto_reconnect=True,
+)
 
 def build_author(sender) -> dict:
     if not sender:
@@ -130,7 +146,25 @@ async def handler(event):
         await send_to_n8n(event.message)
 
 async def main():
-    await client.start()
+    print(
+        "Connecting to Telegram with settings:",
+        {
+            "use_ipv6": TG_USE_IPV6,
+            "connect_timeout": TG_CONNECT_TIMEOUT,
+            "request_retries": TG_REQUEST_RETRIES,
+            "connection_retries": TG_CONNECTION_RETRIES,
+            "retry_delay": TG_RETRY_DELAY,
+        },
+    )
+
+    while True:
+        try:
+            await client.start()
+            break
+        except Exception as e:
+            print(f"Telegram connect failed: {e}. Retrying in {TG_RECONNECT_WAIT}s...")
+            await asyncio.sleep(TG_RECONNECT_WAIT)
+
     print("UserBot started...")
     
     if not os.path.exists(HISTORY_CHECK_FILE):