{
  "schema_id": "oid-quarantine/v1",
  "reason": "field-level telemetry callback read FlowField.obs, which is published only at control boundaries; intermediate field telemetry was identically zero and is invalid",
  "disposition": "not admissible for analysis or claims; retained immutable for contradiction evidence",
  "fix": "Legacy FlowField.current_step_observation reads synchronized per-step obs_steps without altering policy clock"
}
