fix+perf: 修复10个bug & 10项性能优化

Bug修复:
- clustersend CEL结果判断从字符串比较改为类型断言
- Nuclei DSL matcher安全降级为false避免误报
- clusterpoc发现漏洞后返回true修正语义
- reverseCheck加10s超时防止ceye API阻塞
- doSearch/bmatches正则编译结果缓存到sync.Map
- evalset CEL求值失败时存空字符串而非原始表达式
- CEL wait()函数加nil Reverse指针检查防panic
- MongoDB readMongoMsg应用timeout参数设置读超时
- TXTWriter.Close确保Sync失败后仍调用file.Close

性能优化:
- 指纹regex缓存从RWMutex+map改为sync.Map消除锁竞争
- CaseInsensitive指纹词加载时预小写化避免匹配时分配
- 版本提取FindAllStringSubmatch限制返回数量
- i18n.Tr用strconv.Itoa替代Sprintf减少分配
- POC加载用atomic.Bool+DCLP消除热路径锁
- 结果缓冲map预分配容量减少rehash
- HTTP连接池参数随并发数动态调整
- getRuleHash去除反射+Headers排序保证确定性dedup
- POC并发加载用channel替代Mutex收集结果

common/output/buffer.go

@@ -22,10 +22,10 @@ type ResultBuffer struct {
 // NewResultBuffer 创建新的结果缓冲
 func NewResultBuffer() *ResultBuffer {
 	return &ResultBuffer{
-		seenHosts:    make(map[string]struct{}),
-		seenPorts:    make(map[string]struct{}),
-		seenServices: make(map[string]int),
-		seenVulns:    make(map[string]struct{}),
+		seenHosts:    make(map[string]struct{}, 256),
+		seenPorts:    make(map[string]struct{}, 512),
+		seenServices: make(map[string]int, 128),
+		seenVulns:    make(map[string]struct{}, 64),
 	}
 }
 

common/output/writers.go

@@ -350,13 +350,17 @@ func (w *TXTWriter) Close() error {
 		os.Remove(w.realtimePath)
 	}
 
+	var firstErr error
 	if err := w.bufWriter.Flush(); err != nil {
-		return err
+		firstErr = err
 	}
-	if err := w.file.Sync(); err != nil {
-		return err
+	if err := w.file.Sync(); err != nil && firstErr == nil {
+		firstErr = err
 	}
-	return w.file.Close()
+	if err := w.file.Close(); err != nil && firstErr == nil {
+		firstErr = err
+	}
+	return firstErr
 }
 
 // writeSection 写入一个分类的所有结果