Fix build error

src/host_stream/event_recorder.c

@@ -580,6 +580,11 @@ static void *test_buzzer_all_thread(void *arg)
     return NULL;
 }
 
+/* Forward declaration — defined later in this file */
+static void request_snap(const char *filename, const char *work_dir,
+                         const char *event_id, const char *event_type,
+                         int max_level, int immediate_upload);
+
 static void *test_upload_thread(void *arg)
 {
     (void)arg;