fix: 修复LinkTaskMapper中target_score列不存在的SQL错误

- 移除LinkTaskMapper.xml中所有对不存在的target_score列的引用
- 修复因SQL查询不存在列导致的BadSqlGrammarException
- 添加TargetScoreResponse DTO用于目标点数响应
- 更新LinkController添加获取目标点数接口
- 优化UserLinkStatusResponse添加machineId字段
- 更新数据库schema文档

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/main/java/com/gameplatform/server/controller/link/LinkController.java

@@ -12,6 +12,7 @@ import com.gameplatform.server.model.dto.link.PollLoginResponse;
 import com.gameplatform.server.model.dto.link.SelectRegionRequest;
 import com.gameplatform.server.model.dto.link.SelectRegionResponse;
 import com.gameplatform.server.model.dto.link.UserLinkStatusResponse;
+import com.gameplatform.server.model.dto.link.TargetScoreResponse;
 import com.gameplatform.server.service.link.LinkGenerationService;
 import com.gameplatform.server.service.link.LinkListService;
 import com.gameplatform.server.service.link.LinkStatusService;
@@ -484,6 +485,31 @@ public Mono<Boolean> deleteLink(@PathVariable("codeNo") String codeNo, Authentic
                     }
                 });
     }
+
+    /**
+     * 获取目标点数接口
+     */
+    @GetMapping("/target-score")
+    @Operation(summary = "获取目标点数", description = "根据链接编号获取目标点数，如果返回的是数字则保存到数据库，否则提示网络繁忙")
+    public Mono<TargetScoreResponse> getTargetScore(@RequestParam("codeNo") String codeNo) {
+        log.info("=== 开始获取目标点数 ===");
+        log.info("请求参数: codeNo={}", codeNo);
+        
+        return linkStatusService.getTargetScore(codeNo)
+                .doOnSuccess(response -> {
+                    if (response.isSuccess()) {
+                        log.info("目标点数获取成功: codeNo={}, machineId={}, targetScore={}", 
+                                response.getCodeNo(), response.getMachineId(), response.getCompletedPoints());
+                    } else {
+                        log.warn("目标点数获取失败: codeNo={}, machineId={}, error={}", 
+                                response.getCodeNo(), response.getMachineId(), response.getErrorMessage());
+                    }
+                })
+                .doOnError(error -> {
+                    log.error("获取目标点数时发生异常: codeNo={}, error={}", 
+                            codeNo, error.getMessage(), error);
+                });
+    }
 }
 
 

src/main/java/com/gameplatform/server/controller/link/QrProxyController.java

@@ -352,7 +352,6 @@ public class QrProxyController {
             response.setTimes(linkBatch.getTimes());
             response.setTotalPoints(linkBatch.getQuantity() * linkBatch.getTimes());
             response.setCompletedPoints(linkTask.getCompletedPoints());
-            
             // 设置游戏区域信息
             response.setRegion(linkTask.getRegion());
             response.setRegionDesc(getRegionDescription(linkTask.getRegion()));