The now parameter (and partialGraph.now) replaced the need for global
Date.now patching in tests. The ttl-expiry parity campaign's module-scope
patch and the relational-comparator Time-Based Decay tests' before/after
patches now pass the clock explicitly through check options — no global
mutation, no restore-order fragility, and the pinned-clock cache bypass
keeps every evaluation honest. No stale references to the removed
compiled evaluator or useCompiled option remain in the test suite.