Add orchestration v2 replay and service contracts

- Introduce orchestration v2 service interfaces and error types
- Add replay runtime, fixtures, and integration coverage
- Update shared contracts and probe transcripts

Co-authored-by: codex <codex@users.noreply.github.com>
082485a3deJulius Marminge committed on 8/29/2026, 5:59:57 AMparent14d57e2
61 files changedLine totals unavailable