* fix(diagnostics-otel): surface error message on run/harness error spans
Errored openclaw.run / openclaw.harness.run spans only carried a
low-cardinality errorCategory (or a hardcoded "error"), so trace UIs
showed "outcome error" with no message. Thread the redacted error
message through run.completed / harness.run.completed / harness.run.error
onto an openclaw.error span attribute + span status, mirroring
recordWebhookError. The raw message stays off metric attrs to preserve
cardinality; support-bundle redaction covers the new error field by name.
* fix(diagnostics-otel): harden run failure telemetry
Co-authored-by: Alex Knight <aknight@atlassian.com>
* test(diagnostics-otel): assert wire-level redaction
* chore(changelog): defer release note to release process
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Co-authored-by: Peter Steinberger <steipete@gmail.com>
