GetCascadeTrajectorySteps has 775-step hard limit and cannot see
WAITING steps beyond that. No RPC exists for direct WAITING detection.
New approach: if stepCount frozen for 2+ polls (~10s) while status is
RUNNING, treat as WAITING and write pending approval to Discord.
30s cooldown prevents duplicate pending messages.
Also removes the last GetCascadeTrajectorySteps call from Extension -
now only a single GetAllCascadeTrajectories RPC per 5s poll cycle.
CD
9b9c9c71fe