Make combat scene validation more reliable

docs/internal/pipeline.md

@@ -231,6 +231,8 @@ Debug recording is attempt-scoped and application-owned. A failure to persist
 required debug data is a framework error. State roots, persistence, reason-code
 meanings, resume, and cleanup are intentionally owned by
 [Run State Internals](state.md) and [Operations](../operations.md).
+Extract-validator trace scopes include the current chunk ordinal so concurrent
+chunks cannot overwrite one another's validator attempts or LLM artifacts.
 
 ## Invariants To Preserve