Werk #18182: OTel: Sanitze metric name for high cardinality metrics

Component

Checks & agents

Title

OTel: Sanitze metric name for high cardinality metrics

Date

Sep 29, 2025

Level

Trivial Change

Class

Bug Fix

Compatibility

Incompatible - Manual interaction might be required

Checkmk versions & editions

2.5.0b1 Not yet released	Checkmk Cloud (CCE), Checkmk MSP (CME)
2.4.0p14 Not yet released	Checkmk Cloud (CCE), Checkmk MSP (CME)

When implementing high cadinality metrics aka services with a high number of metrics (>20) in Open Telemetry services, the wrong metric name was used.

This werk changes the metric name to be properly sanitized for the rrd metric backend.

Metric data will be lost, since the metric name changes.

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