changelog for v 1.5.6
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## Summary by CodeRabbit
- **New Features**
- Display document creation time in the documents view.
- Introduced direct template links for easier access.
- Added support for OpenID Connect (OIDC) for improved authentication
options.
- **Enhancements**
- Transitioned to a new rust-based library for signing documents,
enhancing performance and security.
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