* fix: uses time.Date to construct time at midnight in Timezone instead of Truncate
* test: check for Perth validity using adjusted timezone handling
* chore: remove newlines around day adjustment block
* chore: remove separate define of dayWhereMaintenancePeriodWouldStart
* feat(alerting): add timezone for maintenance
* Update config/maintenance/maintenance.go
* docs: Add example of maintenance.timezone in readme.md
* fix: Only set time to timezone location if the location is set
* fix: Include the original error in the message
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Co-authored-by: TwiN <twin@linux.com>