feat: Add recent performance stability stats (matches/days) to player profile

ETL/verify/verify_L3.py

@@ -0,0 +1,29 @@
+
+import sqlite3
+import pandas as pd
+
+L3_DB_PATH = 'database/L3/L3_Features.sqlite'
+
+def verify():
+    conn = sqlite3.connect(L3_DB_PATH)
+    
+    # 1. Row count
+    cursor = conn.cursor()
+    cursor.execute("SELECT COUNT(*) FROM dm_player_features")
+    count = cursor.fetchone()[0]
+    print(f"Total Players in L3: {count}")
+    
+    # 2. Sample Data
+    df = pd.read_sql_query("SELECT * FROM dm_player_features LIMIT 5", conn)
+    print("\nSample Data (First 5 rows):")
+    print(df[['steam_id_64', 'total_matches', 'basic_avg_rating', 'sta_last_30_rating', 'bat_kd_diff_high_elo', 'hps_clutch_win_rate_1v1']].to_string())
+    
+    # 3. Stats Summary
+    print("\nStats Summary:")
+    full_df = pd.read_sql_query("SELECT basic_avg_rating, sta_last_30_rating, bat_win_rate_vs_all FROM dm_player_features", conn)
+    print(full_df.describe())
+    
+    conn.close()
+
+if __name__ == "__main__":
+    verify()