Updated `docker-compose-datadog.yml` with new environment variables and updated image versions, enhancing trace sampling and service autodiscovery. Added Kubernetes deployment, service, and role files for `elsa-server`, `elsa-studio`, `plant-uml`, `postgres`, and `trace-lens`, improving the project's infrastructure. Enhanced OpenTelemetry middleware for better error handling and detailed tracing of activity and workflow executions.
This commit introduces the Elsa.OpenTelemetry module to provide OpenTelemetry sources for tracing workflow and activity execution. Additionally, it updates the program to include default workflow and activity execution pipelines with tracing middleware, and improves pipeline builder extensions to support middleware insertion.
