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The tx.transactor span covered only the apply stage; preflight and preclaim had no telemetry, so a transaction that hard-failed those stages produced no apply-pipeline span and per-stage latency/failure was invisible. Add tx.preflight and tx.preclaim spans in applySteps.cpp via a makeStageSpan() helper using SpanGuard::hashSpan, so all three stages share a deterministic trace_id derived from txID[0:16] even though they run sequentially and often cross-thread. Each span carries stage, tx_type, and ter_result; exceptions are recorded as tefEXCEPTION before the public wrappers map them. The type lookup is guarded behind the span-active check so it costs nothing when tracing is off. Add a stage="apply" attribute to the tx.transactor span and move its three hardcoded attribute strings to a new library-safe header include/xrpl/tx/detail/TxApplySpanNames.h, which mirrors the daemon-side TxSpanNames.h strings so the collector spanmetrics connector aggregates both span sets under one dimension set. A constants-contract test pins the span-name, attribute-key, and stage-value strings; span content stays covered by the docker integration test, as the rest of the telemetry suite is. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>