* Improve session message injection methods
* Add more tests for session injection
* Change return type from MqttPublishPacket to MqttPacketWithIdentifier
* Use dedicated type for MattApplicationMessage injection result
* Code review minor fixes
* Apply project code style
* Update release notes
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Co-authored-by: Anton Smolkov <anton.smolkov@idp.zyfra.com>
Co-authored-by: christian <6939810+chkr1011@users.noreply.github.com>
