🔧 Fix all timestamp conversion bugs in database methods

🐛 Multiple Critical Bugs Fixed:
- get_daily_buy_count() - daily transaction counting
- get_quick_stats() - stats logging
- All methods using timestamp conversion

🔧 Technical Problem:
- Multiple methods calculated date ranges in seconds (Python)
- Binance transact_time stored in milliseconds
- x1000 conversion factor missing across multiple functions

📊 Impact:
- Daily buy counting: 0 instead of 4
- Quick stats logging: 0 instead of 4
- All timestamp-based filtering broken

✅ Solution:
- Convert all date range calculations to milliseconds (*1000)
- Consistent timestamp handling across all database methods
- Added debug logging for verification

🎯 All timestamp-based database queries now work correctly

Author: fvetter

src/database.py

@@ -248,14 +248,16 @@ def get_last_buy_time(self, symbol: str) -> Optional[float]:
             return None
 
     def get_quick_stats(self) -> Dict:
-        """Stats rapides pour les logs (UTILISÉE)"""
+        """Stats rapides pour les logs - VERSION CORRIGÉE timestamps"""
         try:
             today = datetime.now().strftime('%Y-%m-%d')
-            today_start = int(datetime.strptime(today, '%Y-%m-%d').timestamp())
-            today_end = today_start + 86400
+            
+            # 🔧 CORRECTION: Timestamps Binance en millisecondes !
+            today_start = int(datetime.strptime(today, '%Y-%m-%d').timestamp() * 1000)  # x1000
+            today_end = today_start + (86400 * 1000)  # +24h en millisecondes
 
             with self.get_connection() as conn:
-                # Achats du jour
+                # Achats du jour - VERSION CORRIGÉE
                 cursor = conn.execute("""
                     SELECT COUNT(*) FROM transactions 
                     WHERE order_side = 'BUY'
@@ -272,6 +274,9 @@ def get_quick_stats(self) -> Dict:
                 cursor = conn.execute("SELECT COUNT(*) FROM transactions")
                 total_transactions = cursor.fetchone()[0]
 
+                # Debug pour vérification
+                self.logger.debug(f"🔍 Stats quick: {daily_buys} achats aujourd'hui (range: {today_start}-{today_end})")
+                
                 return {
                     'daily_buys': daily_buys,
                     'active_oco': active_oco,