Consumer Lag: Cache Staleness Snapshot

Model how consumer lag on an event stream translates into cache staleness: whether the current consumer capacity recovers from an existing backlog or falls further behind, and how many consumers would be required to keep pace. This is a single steady-state evaluation of your inputs, not a time-evolving simulation.

Expected cache age and freshness-bound exceedance are computed from your inputs, not an independently measured or predicted production value — treat them as directional estimates, not a promise about what your real system will do.