* fix(omp): keep transcript replay responsive
Index transcript branches in bounded asynchronous chunks and retain payloads only for the active chain, so large histories do not block unrelated daemon requests.
* test(omp): enforce responsive history replay in CI
Use a smaller structured transcript and a short selected chain to expose whole-file parsing without making large-output GC part of the CI gate. Disable unrelated provider discovery and route the regression through the existing integration job.
* test(ci): include OMP replay in the routing contract