feat(syslog): 优化大日志通道并增加异常连续消费兜底

- 128 KiB 及以上日志默认进入大日志 Topic
- InfluxDB 原文及达梦大字段超过 256 KiB 时截断保存
- 截断内容追加 HB_XDR_TRUNCATED 标记
- InfluxDB 写入失败时继续执行规则解析和达梦写入
- 未知或系统性异常优先写入普通/大日志 DLT
- DLT 写入失败时记录特殊告警并提交 offset，避免阻塞后续消息
- DLT 失败等待时间默认限制为 1 秒
- 增加连续性放行、DLT 成功及失败监控指标
- 更新 Docker Compose、v3 升级文档及相关测试

haobang-security-dm/syslog-serve/src/main/java/com/haobang/wal/SyslogWalStatusController.java

@@ -29,13 +29,16 @@ public class SyslogWalStatusController {
     public Map<String, Object> status() {
         Map<String, Object> value = new LinkedHashMap<>();
         value.put("network_received", SyslogMessageHandler.getNetworkReceivedCount());
+        value.put("network_oversized_dropped", SyslogMessageHandler.getOversizedDroppedCount());
         value.put("wal_appended", wal.getAppendedCount());
         value.put("wal_queue_size", wal.getQueueSize());
         value.put("wal_queue_capacity", wal.getQueueCapacity());
+        value.put("wal_pending_bytes", wal.getPendingAppendBytes());
         value.put("wal_durable_sequence", wal.getDurableSequence());
         value.put("wal_checkpoint_sequence", wal.getCheckpointSequence());
         value.put("wal_pending_approx", wal.getPendingRecordsApprox());
         value.put("wal_admission_backpressure", wal.getBackpressureCount());
+        value.put("wal_admission_oversized", wal.getOversizedCount());
         value.put("wal_terminal_recorded", wal.getTerminalRecordedCount());
         value.put("wal_quarantined", wal.getQuarantinedCount());
         Map<String, Long> pointTimeAssigned = new LinkedHashMap<>();
@@ -49,7 +52,9 @@ public class SyslogWalStatusController {
         value.put("wal_fatal_error", wal.getFatalFailure() == null
                 ? null : wal.getFatalFailure().toString());
         value.put("dispatch_inflight", dispatcher.getInflight());
+        value.put("dispatch_inflight_bytes", dispatcher.getInflightBytes());
         value.put("kafka_acked", dispatcher.getKafkaAcked());
+        value.put("kafka_large_dispatched", dispatcher.getLargeDispatched());
         value.put("dispatch_terminal_filtered", dispatcher.getTerminalFiltered());
         value.put("dispatch_retry", dispatcher.getRetryCount());
         value.put("tcp_pause_total", SyslogMessageHandler.getTcpPauseCount());