fix: 7 bugs — parse_mode, /removeplayer, SNo>300, fd leak, warmup sleep, warmup range, dupe print

- cancel_sub: add parse_mode=MARKDOWN_V2 so users don't see literal backslashes
- /removeplayer: add CommandHandler that was advertised in /start but missing from handlers
- parse_standings: raise SNo limit 300→5000 to support large open tournaments
- call_bbp_with_checklist: close mkstemp fd to fix resource leak
- _warmup_cache_sync: make time.sleep(1.0) conditional on HTTP fetch, skip for cache hits
- _warmup_cache_sync: derive start_tnr from max(max_tnr_seen, max cached tnr) instead of hardcoded 1445000
- main: remove duplicate print('Client bot started') after blocking run_polling()

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

bots/client_bot.py

@@ -321,9 +321,9 @@ async def add_player(update: Update, context: ContextTypes.DEFAULT_TYPE):
 async def cancel_sub(update: Update, context: ContextTypes.DEFAULT_TYPE):
     had_fide = context.user_data.pop('awaiting_fide_id', None)
     if had_fide:
-        await update.message.reply_text('❎ Подписка отменена\.')
+        await update.message.reply_text('❎ Подписка отменена\.', parse_mode=ParseMode.MARKDOWN_V2)
     else:
-        await update.message.reply_text('Нет активного процесса подписки\.')
+        await update.message.reply_text('Нет активного процесса подписки\.', parse_mode=ParseMode.MARKDOWN_V2)
 
 
 def _player_card(p: dict, loc: dict) -> tuple[str, InlineKeyboardMarkup]:
@@ -424,6 +424,16 @@ def _extract_fide_id(text: str) -> int | None:
     return None
 
 
+async def remove_player(update: Update, context: ContextTypes.DEFAULT_TYPE):
+    loc = _get_locale((update.effective_user.language_code or ''))
+    await update.message.reply_text(
+        loc['no_players'] if not tracker.get_user_subs(update.effective_user.id)
+        else ('Нажми 🗑 *Удалить* рядом с нужным игроком:\n/myplayers'
+              if (update.effective_user.language_code or '').startswith('ru')
+              else 'Tap 🗑 *Remove* next to the player:\n/myplayers'),
+        parse_mode=ParseMode.MARKDOWN_V2)
+
+
 async def _lookup_and_confirm(update: Update, context, fide_id: int):
     user = update.effective_user
     lang_code = user.language_code or ''
@@ -730,6 +740,7 @@ def main():
     app.add_handler(CommandHandler('addplayer', add_player))
     app.add_handler(CommandHandler('cancel', cancel_sub))
     app.add_handler(CommandHandler('myplayers', my_players))
+    app.add_handler(CommandHandler('removeplayer', remove_player))
     app.add_handler(CallbackQueryHandler(remove_player_callback, pattern=r'^remove:\d+$'))
     app.add_handler(MessageHandler(filters.TEXT & ~filters.COMMAND, handle_url))
 
@@ -742,8 +753,6 @@ def main():
     app.job_queue.run_repeating(
         tracker.warmup_cache, interval=21600, first=10)
 
-    print('Client bot started', file=sys.stderr)
-
     print('Client bot started', file=sys.stderr)
     app.run_polling()