Fix repeating timer initial delay

[ipavlidakis]

🔗 Issue Links

N/A

🎯 Goal

Honor the requested interval before a repeating timer's first fire.

📝 Summary

• Schedule the first deadline using the TimeInterval value in seconds.
• Add a regression test that rejects an early first fire.

🛠 Implementation

Uses the native DispatchTime + TimeInterval operation already used by the
one-shot timer. This avoids interpreting a seconds value as milliseconds and
preserves fractional intervals.

🎨 Showcase

N/A

🧪 Manual Testing Notes

Automated timing coverage verifies the behavior. No manual QA is required.

☑️ Contributor Checklist

• I have signed the Stream CLA (required)
• This change should be manually QAed
• Changelog is updated with client-facing changes
• Changelog is updated with new localization keys
• New code is covered by unit tests
• Documentation has been updated in the docs-content repo

[github-actions]

	1 Message
📖	Skipping Danger since the Pull Request is classed as Draft/Work In Progress

Generated by 🚫 Danger

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud