chore: update renovate schedule

[olivermeyer]

Currently Renovate rebases its PRs several times a day, which causes concurrent CI runs.

This does not avoid the concurrent CI run issue, but it should prevent it from happening several times during the day.

[Copilot]

Pull request overview

Updates the repository’s Renovate configuration to restrict when Renovate is allowed to update/rebase PRs, aiming to reduce daytime CI concurrency caused by frequent rebases.

Changes:

• Changed Renovate’s global schedule from “at any time” to a nightly window (00:00–05:59, Europe/Berlin).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.
see 11 files with indirect coverage changes

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[Copilot]

Pull request overview

Copilot reviewed 1 out of 1 changed files in this pull request and generated 1 comment.

[Copilot]

The top-level schedule is now a cron expression, while lockFileMaintenance.schedule uses Renovate’s natural-language schedule format. For consistency/readability (and to avoid ambiguity about how Renovate interprets cron strings), consider switching this to the same natural-language window (e.g., “after 12am and before 6am”) or adding a short comment explaining the cron format/time window intent.

Suggested change

	"schedule": ["* 0-5 * * *"],
	"schedule": ["after 12am and before 6am"],