Error for reports with schedules after database migration to v1.0.0

[Svido]

Describe the bug

The column config ist NULL in table schedule after applying migration script for MariaDB 10.5.22 on Oracle Linux 8.
This leads to errors in the WebUI and reporting daemon referencing library/Reporting/Schedule.php line 58.

To Reproduce

Steps to reproduce the behavior:

1. Update to v 1.0.0
2. Execute Migration Script

Expected behavior

The migration should convert the

Screenshots

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Your Environment

• Module version: 1.0.0
• Dependent module versions:
• Icinga Web 2 version and modules (System - About): 2.12
• Web browser and version:
• Icinga 2 version used (icinga2 --version):
• PHP version used (php --version):
• Server operating system and version: Oracle Linux 8

Additional context

The cause for the failing migration is the use of the named timezones for the function "CONVERT_TZ".
As the documentation states (https://mariadb.com/kb/en/convert_tz/), those are only available after loading them with "mysql_tzinfo_to_sql".
After restoring the previous version of the table and executing the migration script with
CONVERT_TZ(FROM_UNIXTIME(schedule_start / 1000), @@session.TIME_ZONE, 'UTC')
replaced by
CONVERT_TZ(FROM_UNIXTIME(schedule_start / 1000), '+02:00', '+00:00')
the migration worked.
As a sidenote, there is another small error. The DATE_FORMAT "%u" is for weeknumbers. You probably ment "%f" (https://mariadb.com/kb/en/date_format/).