refactor: Prevent duplicate table creation messages in trading_plan table

src/trading/trading_plan.py

@@ -78,6 +78,18 @@ def create_trading_plan_table():
     """Create the trading plans table if it doesn't exist"""
     with create_client() as client:
         try:
+            # First check if table exists
+            check_query = """
+            SELECT name 
+            FROM system.tables 
+            WHERE database = currentDatabase() 
+            AND name = 'trading_plans'
+            """
+            result = client.query(check_query)
+            
+            if result.result_rows:
+                return  # Table already exists, silently return
+                
             # Create new table with a structure that supports updates
             query = """
             CREATE TABLE IF NOT EXISTS trading_plans