feat: implement distributed tracing with OpenTelemetry and trace context propagation (closes #108)#210
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elizabetheonoja-art merged 1 commit intoJul 24, 2026
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…ext propagation (closes Utility-Protocol#108) - Add OTLP gRPC batch exporter with head-based error-aware sampling (1% success, 100% error) and 5s batch interval - Add init_tracing_otel_bridge() to wire tracing spans into OpenTelemetry - Add init_propagators_only() for test-safe W3C context propagation - Create db_tracing module with QuerySpanGuard and trace_query() - Create kafka_propagator module for W3C traceparent injection in Kafka message headers - Add #[tracing::instrument] spans to key handlers: submit_reading, settle_account, register_meter, get_diagnostics, calibrate_meter - Add tracing spans to Soroban RPC call_rpc and settlement executor - Wire OpenTelemetry initialization into main.rs startup - Add integration tests for OTLP pipeline, W3C propagation, Kafka headers, sampling, and DB tracing guards - Add tonic/grpc-tonic features to opentelemetry-otlp dependency
elizabetheonoja-art
merged commit Jul 24, 2026
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Utility-Protocol:main
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Summary
Implements distributed tracing with OpenTelemetry SDK across all services as described in #108.
Changes
Technical Invariants Met
Closes #108