Log on debug level if action not in payload

[mietzen]

I would like to propose setting the log level to DEBUG if action is not present in the MQTT payload, since this creates a lot of noise during firmware upgrades:

Also, isn’t it legitimate to receive messages with a payload that doesn’t contain an action?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 95%. Comparing base (e4f1ca9) to head (f084763).
⚠️ Report is 14 commits behind head on main.

Additional details and impacted files

@@ Coverage Diff @@ ## main #1320 +/- ## ==================================== Coverage 95% 95% ==================================== Files 66 66 Lines 2756 2756 ==================================== Hits 2612 2612 Misses 144 144 

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