fix: built-in MQTT bridge handling of QoS 0 messages published to the cloud topic #5993

Job	Run time
Check whether Cargo.lock is up to date	29s
Block fixup commits	8s
Filter changes	2s
Shellcheck	9s
Spell Check with Typos	5s
Run cargo fmt	17s
Run cargo audit	16s
Run cargo clippy	1m 46s
Run cargo test	10m 41s
Run cargo check on MSRV	1m 36s
Sort dependencies	2m 1s
nightly / doc	1m 47s
Check markdown	0s
Check for unused dependencies	7m 4s
	26m 21s

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