fix: harden jt808 tdengine ingestion

modules/core/ingest-core/src/main/java/com/lingniu/ingest/core/pipeline/builtin/RateLimitInterceptor.java

@@ -36,16 +36,44 @@ public class RateLimitInterceptor implements IngestInterceptor, Ordered {
 
     @Override
     public boolean before(RawFrame frame, IngestContext ctx) {
-        String vin = frame.sourceMeta().getOrDefault("vin", "unknown");
-        // VIN 粒度隔离，避免某一辆车的高频/异常上报挤占其他车辆处理额度。
-        RateLimiter rl = limiters.get(vin, k -> RateLimiter.of("vin-" + k, defaultConfig));
+        String limiterKey = limiterKey(frame);
+        // 车辆粒度隔离：VIN 可用时按 VIN；JT808 等未映射 VIN 的协议按 vehicleKey/phone 兜底，
+        // 避免所有 unknown 终端挤在同一个限流桶里。
+        RateLimiter rl = limiters.get(limiterKey, k -> RateLimiter.of("vehicle-" + k, defaultConfig));
         if (!rl.acquirePermission()) {
-            ctx.abort("rate-limited:" + vin);
+            ctx.abort("rate-limited:" + limiterKey);
             return false;
         }
         return true;
     }
 
+    private static String limiterKey(RawFrame frame) {
+        String vin = meta(frame, "vin");
+        if (isKnown(vin)) {
+            return "vin:" + vin;
+        }
+        String vehicleKey = meta(frame, "vehicleKey");
+        if (isKnown(vehicleKey)) {
+            return "vehicleKey:" + vehicleKey;
+        }
+        String phone = meta(frame, "phone");
+        if (isKnown(phone)) {
+            return "phone:" + phone;
+        }
+        return "unknown";
+    }
+
+    private static String meta(RawFrame frame, String key) {
+        if (frame == null || frame.sourceMeta() == null) {
+            return "";
+        }
+        return frame.sourceMeta().getOrDefault(key, "").trim();
+    }
+
+    private static boolean isKnown(String value) {
+        return value != null && !value.isBlank() && !"unknown".equalsIgnoreCase(value.trim());
+    }
+
     @Override
     public int getOrder() {
         return 200;