Werk #16855: bi: Fix crash for services with special characters

Component	BI
Title	bi: Fix crash for services with special characters
Date	May 22, 2024
Level	Trivial Change
Class	Bug Fix
Compatibility	Compatible - no manual interaction needed
Checkmk versions & editions	2.4.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT 2.3.0p4 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT 2.2.0p27 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Ultimate MT

Previously, the BI would crash if a service name had special characters (e.g. emoticons). The error was: "Internal error: ('utf-8', 'bi:aggregation_lookup..., 'surrogates not allowed')". The BI now handles and shows special characters correctly.

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