Upgrade Kotlin to 2.3 and analyze dependencies for Ktor 3.4.0 compatibility

[coderabbitai]

Context

As discovered in PR #1160, upgrading Ktor from 3.3.2 to 3.4.0 requires Kotlin 2.3, but the project is currently on an older Kotlin version.

Tasks

• Upgrade Kotlin to version 2.3
• Analyze and identify all libraries that need to be upgraded alongside Kotlin 2.3
• Test compatibility of current dependencies with Kotlin 2.3
• Document any breaking changes or migration requirements
• Apply the Ktor 3.4.0 upgrade and Dispatchers.IO enforcement from PR fix: update ktor & enforce Dispatchers.IO in engines #1160

References

• Related PR: fix: update ktor & enforce Dispatchers.IO in engines #1160
• Comment: fix: update ktor & enforce Dispatchers.IO in engines #1160 (comment)
• Requested by: @rodvar

Notes

The Ktor 3.4.0 update includes changes to the dispatcher behavior and is considered important for the project. Once the Kotlin upgrade is complete, the changes from PR #1160 should be reapplied.