Communication service message type 43 crash

[NikoofDeath]

Describe the bug
When using Special K (https://github.com/SpecialKO/SpecialK) with its Galaxy integration enabled, it makes requests to the galaxy api that comet is not able to handle, resulting in crashes.
Specifically, comet outputs "comet::api::handlers::communication_service Unhandled communication service message type 43".
Using comet by itself, SK with official galaxy services, or comet with SK with galaxy integration disabled ([steam.log] silent=true) all work.

To Reproduce
Steps to reproduce the behavior:

1. Ensure SK config has platform integrations enabled (silent=false under [Steam.log])
2. Launch game with both comet and special K
3. Open Special K overlay
4. Shortly after, the game will crash

Expected behavior
The functionality of message type 43 to be implemented, or at least handled without triggering a crash.

System (please complete the following information):

• OS: Windows 11
• Architecture: x86_64

[imLinguin]

Thanks for the report, it seems this call is for playtime. I'll look into implementing that shortly and have a nightly build for you to test