Without the change `ebusd` fails the build in `staging-next` as
https://hydra.nixos.org/build/245419852:
In file included from /build/source/src/lib/ebus/device.h:24,
from /build/source/src/lib/ebus/device.cpp:23:
/build/source/src/lib/ebus/transport.h:139:32: error: 'uint8_t' does not name a type
139 | virtual result_t write(const uint8_t* data, size_t len) = 0; // abstract
| ^~~~~~~
/build/source/src/lib/ebus/transport.h:27:1: note: 'uint8_t' is defined in header '<cstdint>'; did you forget to '#include <cstdint>'?
26 | #include "lib/ebus/symbol.h"
+++ |+#include <cstdint>
27 |
