fix(bot): retry admin video upload on transient httpx transport errors

send_video_to_admin_bot() had no retry, unlike the client-facing
reply_video() path fixed earlier — a transient httpx.ReadError during
upload silently dropped the admin copy while the user still got their
video, since this function swallows its own exceptions.

bot.py

@@ -488,8 +488,11 @@ async def send_video_to_admin_bot(video_path: str, url: str, from_user=None):
         if user_info:
             caption += f"\n👤 {user_info}"
         
-        # Отправляем видео
-        with open(video_path, 'rb') as video_file:
+        # Отправляем видео (с ретраем — транспортные ошибки httpx при аплоаде бывают и здесь)
+        send_retries = 3
+        for attempt in range(send_retries):
+            video_file = open(video_path, 'rb')
+            try:
                 await admin_bot.send_video(
                     chat_id=admin_chat_id,
                     video=video_file,
@@ -500,6 +503,14 @@ async def send_video_to_admin_bot(video_path: str, url: str, from_user=None):
                     connect_timeout=60,
                     pool_timeout=60
                 )
+                break
+            except Exception as send_error:
+                if attempt == send_retries - 1:
+                    raise
+                logger.warning(f"Отправка видео админ боту: попытка {attempt + 1}/{send_retries} не удалась: {send_error}")
+                await asyncio.sleep((attempt + 1) * 2)
+            finally:
+                video_file.close()
 
         logger.info(f"Видео отправлено админ боту: {video_path}")