feat：同步人脸优化

android/app/src/main/java/io/flutter/plugins/facediscern/tool/face/servcie/FaceServer.java

@@ -181,7 +181,7 @@ public class FaceServer {
         int searchId = faceEntity.getFaceId();
         FaceEntity oldEntity = copyFaceEntity(faceRegisterInfoMap.get(searchId));
         try {
-            FaceFeatureInfo oldFeature = getFaceFeature(searchId);
+            FaceFeatureInfo oldFeature = oldEntity == null ? getFaceFeatureQuiet(searchId) : null;
             if (oldEntity == null && oldFeature != null) {
                 oldEntity = new FaceEntity(searchId, oldFeature.getFeatureData());
             }
@@ -268,6 +268,22 @@ public class FaceServer {
         return faceFeatureInfo;
     }
 
+    /**
+     * 探测内存库特征但不记录异常日志。
+     *
+     * <p>标识不存在是增量路径的常见前置状态（新样本 upsert 探测旧特征、孤儿
+     * 重复删除的存在性检查），IllegalArgumentException 属预期分支；批量同步
+     * 数千张全新样本时会逐条抛错刷屏，这里静默返回空。</p>
+     */
+    private FaceFeatureInfo getFaceFeatureQuiet(int searchId) {
+        if (faceEngine == null) return null;
+        try {
+            return faceEngine.getFaceFeature(searchId);
+        } catch (IllegalArgumentException e) {
+            return null;
+        }
+    }
+
     // 获取人脸数量
     public synchronized int getTotalFaceCount() {
         if (faceEngine == null) return -99;
@@ -278,7 +294,7 @@ public class FaceServer {
     public synchronized int removeFace(int searchId) {
         if (faceEngine == null) return -99;
         // MQ 和每日快照都可能重复删除同一样本；内存库已不存在时直接按幂等成功处理。
-        if (searchId != -1 && getFaceFeature(searchId) == null) {
+        if (searchId != -1 && getFaceFeatureQuiet(searchId) == null) {
             faceRegisterInfoMap.remove(searchId);
             return ErrorInfo.MOK;
         }