[feature] Open Telemetry - metrics

[ivicac]

As a System Admin
I want to be able to collect and observe Bytechef instances through exposed Open Telemetry infrastructure
So that I can monitor metrics and logs of ByteChef instances by using observation tools I already use in my organization.

Technical details in this iteration:
https://spring.io/blog/2022/10/12/observability-with-spring-boot-3
https://blog.frankel.ch/opentelemetry-tracing-spring-boot/
https://spring.io/blog/2024/10/28/lets-use-opentelemetry-with-spring
https://www.jhipster.tech/monitoring/#forwarding-logs-to-logstash

Acceptance Criteria

• Support for metrics
• EE feature - activation only on EE version
  - Implement EnvironmentPostProcessor in ee observability-config module
  - Define bytechef.observability.metrics.enabled property

Definition of Done
TODO