Goal: Add trace and span IDs to logs across Spring Boot apps and export distributed traces to your observability stack (e.g., Grafana Tempo via OpenTelemetry Collector), with sensible defaults for web, messaging, and database layers.
- Spring Boot: 3.1+ (works with 3.3/3.4). Micrometer Tracing replaces Spring Cloud Sleuth.
- Java: 17+ (matches your standard).