fix(examples): ncclfrreceiver example_config -> RFC-0013 (#457)

module/receiver/ncclfrreceiver/README.md

@@ -44,9 +44,14 @@ you can exercise the full receiver pipeline on a laptop:
 ```bash
 mkdir -p /tmp/nccl-fr
 tracecore failure-inject nccl-hang --out /tmp/nccl-fr/rank-0.pkl
-tracecore collect --config module/receiver/ncclfrreceiver/example_config.yaml
+./_build/tracecore --config=module/receiver/ncclfrreceiver/example_config.yaml
 ```
 
+> The legacy `tracecore collect` subcommand was removed in
+> [RFC-0013 PR-A2](../../../docs/rfcs/0013-distro-first-pivot.md);
+> the OCB-assembled binary takes `--config=` directly. Build via
+> `make build` from the repo root.
+
 The receiver picks up the synthesized hang dump within `poll_interval`
 and emits two records (a completed all-reduce + a started one that
 never completes) via the configured exporter.

module/receiver/ncclfrreceiver/example_config.yaml

@@ -26,10 +26,14 @@ receivers:
     hw_id: gpu-0
 
 exporters:
-  stdoutexporter:
+  # RFC-0013 PR-A2 retired the in-tree `stdoutexporter`; the upstream
+  # `debug` exporter is the post-pivot successor. `verbosity: detailed`
+  # prints every attribute, matching the old stdoutexporter output.
+  debug:
+    verbosity: detailed
 
 service:
   pipelines:
     logs:
       receivers: [nccl_fr]
-      exporters: [stdoutexporter]
+      exporters: [debug]