feat(video-review): 支持机位多维度评价功能

- 新增NestedMapTypeHandler处理嵌套Map与JSON互转
- 修改VideoReview相关实体类和DTO以支持嵌套Map结构
- 更新数据库查询逻辑以适配新的评价数据结构
- 优化平均分计算方法以处理多机位多维度评分
- 完善MyBatis配置中的typeHandler引用
- 补充视频查询接口返回任务开始结束时间字段
- 修正SQL关联查询条件确保数据准确性

src/main/java/com/ycwl/basic/handler/NestedMapTypeHandler.java

@@ -0,0 +1,77 @@
+package com.ycwl.basic.handler;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.core.type.TypeReference;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.ibatis.type.BaseTypeHandler;
+import org.apache.ibatis.type.JdbcType;
+
+import java.sql.CallableStatement;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * 嵌套Map类型的TypeHandler,用于处理JSON字段与Map<String, Map<String, Integer>>的互转
+ * 主要用于机位评价功能:外层key为机位ID,内层Map为该机位的各维度评分
+ *
+ * 数据格式示例:
+ * {
+ *   "12345": {"清晰度": 5, "构图": 4, "色彩": 5, "整体效果": 4},
+ *   "12346": {"清晰度": 4, "构图": 5, "色彩": 4, "整体效果": 5}
+ * }
+ */
+@Slf4j
+public class NestedMapTypeHandler extends BaseTypeHandler<Map<String, Map<String, Integer>>> {
+
+    private final ObjectMapper objectMapper = new ObjectMapper();
+    private final TypeReference<Map<String, Map<String, Integer>>> typeReference =
+            new TypeReference<Map<String, Map<String, Integer>>>() {};
+
+    @Override
+    public void setNonNullParameter(PreparedStatement ps, int i, Map<String, Map<String, Integer>> parameter, JdbcType jdbcType) throws SQLException {
+        try {
+            String json = objectMapper.writeValueAsString(parameter);
+            ps.setString(i, json);
+        } catch (JsonProcessingException e) {
+            log.error("序列化嵌套Map为JSON失败", e);
+            throw new SQLException("序列化嵌套Map为JSON失败", e);
+        }
+    }
+
+    @Override
+    public Map<String, Map<String, Integer>> getNullableResult(ResultSet rs, String columnName) throws SQLException {
+        String json = rs.getString(columnName);
+        return parseJson(json);
+    }
+
+    @Override
+    public Map<String, Map<String, Integer>> getNullableResult(ResultSet rs, int columnIndex) throws SQLException {
+        String json = rs.getString(columnIndex);
+        return parseJson(json);
+    }
+
+    @Override
+    public Map<String, Map<String, Integer>> getNullableResult(CallableStatement cs, int columnIndex) throws SQLException {
+        String json = cs.getString(columnIndex);
+        return parseJson(json);
+    }
+
+    /**
+     * 解析JSON字符串为嵌套Map
+     */
+    private Map<String, Map<String, Integer>> parseJson(String json) {
+        if (json == null || json.trim().isEmpty()) {
+            return new HashMap<>();
+        }
+        try {
+            return objectMapper.readValue(json, typeReference);
+        } catch (JsonProcessingException e) {
+            log.error("解析JSON为嵌套Map失败, json={}", json, e);
+            return new HashMap<>();
+        }
+    }
+}