loggerd: add wall time to initData (#30251)

* loggerd: add wall time to initData

* bump cereal

* fix

cereal

@@ -1 +1 @@
-Subproject commit b1a1afebb8533a96ff0e8efbba7c10eb47df2af0
+Subproject commit 24a522f6ba47aba12a9baea53020a8323673c79c

system/loggerd/logger.cc

@@ -24,9 +24,12 @@
 
 // ***** log metadata *****
 kj::Array<capnp::word> logger_build_init_data() {
+  uint64_t wall_time = nanos_since_epoch();
+
   MessageBuilder msg;
   auto init = msg.initEvent().initInitData();
 
+  init.setWallTimeNanos(wall_time);
   init.setVersion(COMMA_VERSION);
   init.setDirty(!getenv("CLEAN"));
   init.setDeviceType(Hardware::get_device_type());