Fix tracing after upgrading spring boot to 4.x.x

[Dankoy]

Description

Updated dependencies.

Updated application properties.

For custom RestClients, which use load balancer, added ObservationRegistry.

Fixes #288

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• Run app, logs should contain traces. Zipkin should have traces.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have updated project version if release is planned

[Dankoy]

ok