fix: align jt808 protocol default port

modules/protocols/protocol-jt808/src/test/java/com/lingniu/ingest/protocol/jt808/config/Jt808PropertiesTest.java

@@ -0,0 +1,34 @@
+package com.lingniu.ingest.protocol.jt808.config;
+
+import org.junit.jupiter.api.Test;
+
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class Jt808PropertiesTest {
+
+    @Test
+    void defaultsToCurrentProductionReceivePort() throws IOException {
+        assertThat(new Jt808Properties().getPort()).isEqualTo(808);
+
+        String pom = Files.readString(repositoryRoot()
+                .resolve("modules/protocols/protocol-jt808/pom.xml"));
+        assertThat(pom)
+                .contains("默认 TCP 808")
+                .doesNotContain("10808");
+    }
+
+    private static Path repositoryRoot() {
+        Path current = Path.of(System.getProperty("user.dir")).toAbsolutePath();
+        while (current != null) {
+            if (Files.exists(current.resolve("pom.xml")) && Files.exists(current.resolve("modules"))) {
+                return current;
+            }
+            current = current.getParent();
+        }
+        throw new IllegalStateException("repository root not found");
+    }
+}