Zero-code trace-log correlation with OBI

OpenTelemetry eBPF Instrumentation (OBI) enables zero-code trace-log correlation by automatically injecting `traceid` and `spanid` into logs written to stdout or stderr. Because it leverages eBPF, this enrichment requires no application code changes, SDK updates, or service redeployments. To implement it, users simply update their OBI configuration and add a single filter to their log pipeline to handle placeholder lines.