fdb5ae012a
Match the docs to the code after the dead-schema cut and span layer:
- List the actual tel_* tables (runs, spans, model_calls, tool_calls,
error_events) instead of a vague "indexed tel_* tables".
- Add a "Traces and spans" section: a run = one session, each call is a child
span under the run root in tel_spans keyed by span_id, reconstructable as a
connected run -> calls tree. Note subagent cross-run lineage isn't recorded.
- Fix stale "tool failure rates by category" -> "by tool" (categories were
removed; insights groups by raw tool name).
- OTLP: state plainly that events export as per-event spans and the tel_spans
parent/timing linkage isn't reconstructed into connected SpanContexts yet,
matching the exporter's own docstring.
- README: "telemetry plane" -> "telemetry system" (stale rename miss); mention
spans.
Config reference verified to match DEFAULT_CONFIG exactly (9 keys).