* test(qa): canonicalize channel routing scenarios
* test(qa): enforce Crabline actor allowlists
* test(qa): preserve canonical flow integration
* test(matrix): use retained topology fixture id
* test(qa): preserve WhatsApp live defaults
* QA: declare channel transport policy in scenarios
* refactor(qa): keep transport policy type local
* refactor(qa): keep transport policy on leaf contract
* test(matrix): use retained routing fixture
* perf(qa-lab): speed up smoke ci suite
* fix(qa-lab): satisfy suite scheduler lint
* fix(qa-lab): settle unified partitions before retry
* fix(qa-lab): preserve isolated suite safeguards
* refactor(qa-lab): make suite isolation explicit
* fix(qa-lab): preserve channel-driver suite serialization
* fix(qa-lab): narrow flow-only isolation metadata
Adds stdout and both-mode diagnostics OTEL log export, with focused QA Lab smoke coverage and docs/config updates.
Prepared head SHA: efa2ef07ab
Verification: CI 27808480969 passed for the prepared head.
Reviewed-by: @jesse-merhi