Status: IN
The combination of time injection (notification, rate limiter, crawler) and service injection (payment processor) covers both sources of test non-determinism — temporal behavior and external service responses — unless the inconsistent current_time fallback means some code paths silently revert to wall-clock time when injection is omitted.
time and service injection together eliminate the two main non-determinism sources; the fallback inconsistency threatens completeness
Depends on (SL): time-injection-enables-deterministic-testing, payment-processor-injectable