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Werk #18132: Fix timeperiod validation for imported calendars

Component Setup
Title Fix timeperiod validation for imported calendars
Date Aug 27, 2025
Level Trivial Change
Class Bug Fix
Compatibility Compatible - no manual interaction needed
Checkmk versions & editions
2.5.0b1 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT
2.4.0p11 Checkmk Community, Checkmk Pro, Checkmk Ultimate, Checkmk Cloud, Checkmk Ultimate MT

When updating Checkmk, the config validation would fail with a message similar to the following when validating valid time periods created by importing a calendar:

The following mk files had issues during the validation:

    etc/check_mk/conf.d/wato/timeperiods.mk..................... Failed
    Invalid timeperiods:
    ['<time_period_name>: Missing time periods']

With this Werk, we adapt the validation to no longer complain for these valid time periods

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