Split Experiment lifecycle CI deadline load

[xor-machine]

Summary

• split the Experiment local lifecycle Fast aggregate into independently deadline-bound onboarding and install routes
• preserve the original 133-assertion compatibility route and the measured three-lane aggregate topology
• fail closed on orphaned route declarations and unavailable shared lifecycle code

Cause

The hosted Fast gate reached the unchanged 120-second per-suite deadline while running the combined lifecycle aggregate. The approved CI plan calls for splitting an aggregate at that bound; this does not raise, retry, skip, or bypass any timeout.

TDD evidence

• RED 35a33e3: exact manifest and split-routing contracts failed against the combined route
• GREEN bd8ce17: two manifest routes partitioned all 133 assertions as 86 + 47
• adversarial RED 1efd810, 7132595, 7fee5d0: cross-route overlap, wrong-route, orphan-tail, missing-core, and exact-topology contracts failed
• hardened GREEN 0c64cb8: all 23 aggregate contracts and all 43 Experiment contracts pass
• concurrent production timing: onboarding 52.48s; install lifecycle 54.37s

Gates

• ./scripts/dev/check default quick — pass=33 fail=0 skip=0 infra=0
• ./tools/validate.sh --strict — PASS
• bash tests/experiment/contract-cases.sh — 43/43
• bash tests/dev/security-gate-cases.sh — PASS