feat: Add session filter to trading check + fix drawdown calculation

- Add session check (SCHRITT 0) to enhanced_trading_check_wrapper
- Fix max_drawdown calculation to cap at 100% when equity goes negative
- Add _save_data() after _update_stats() to persist stats
- Add auto-sync scheduler job for demo tracker (every 5 min)
- Fix MT5 trade sync to match entry deals by position_id
- Enable Asian session in session_filter_patch.py

Session config now:
- Asian: ENABLED
- London: BLOCKED
- Overlap: ENABLED
- NY: ENABLED

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

session_filter_patch.py

@@ -253,9 +253,9 @@ SCHRITT 3: Scheduler neu starten
 
 SCHRITT 4: Teste mit verschiedenen Modi:
 
-# Standard Mode (NY + Overlap)
+# Standard Mode (Asian + NY + Overlap)
 SESSION_WHITELIST_CONFIG['enabled_sessions'] = {
-    'asian': False, 'london': False,
+    'asian': True, 'london': False,
     'overlap': True, 'ny': True
 }