Enhance authentication logging and update MyBatis configuration

target/classes/application.yml

@@ -13,7 +13,7 @@ spring:
       connection-timeout: 30000
 
 mybatis:
-  mapper-locations: classpath:mapper/*.xml
+  mapper-locations: classpath:mapper/**/*.xml
   type-aliases-package: com.gameplatform.server.model
   configuration:
     map-underscore-to-camel-case: true
@@ -31,6 +31,9 @@ logging:
   level:
     root: info
     com.gameplatform.server: debug
+    org.mybatis: debug
+    org.apache.ibatis: debug
+    com.zaxxer.hikari: info
 
 security:
   jwt:

target/classes/mapper/account/UserAccountMapper.xml

@@ -21,5 +21,11 @@
           AND user_type = #{userType}
         LIMIT 1
     </select>
-</mapper>
 
+    <select id="findByUsername" resultMap="UserAccountMap">
+        SELECT id, user_type, username, display_name, password_hash, role, status, points_balance, created_at, updated_at
+        FROM user_account
+        WHERE username = #{username}
+        LIMIT 1
+    </select>
+</mapper>