live-presentation-modeling: category [3] refetch policy is realized as the
pure §6.3.4 cadence (mediaPlaylistReloadDelay) + delayedReschedule +
RecurringRunner, fetch scheduling per-track. Record the decided error
semantics — a failed reload's rejection propagates and ends the recurrence;
transient-fetch retry is deferred to network-resilience, kept out of the
cadence — and mark the [3] placement open question decided.
ll-hls-support: note that regular-live change-detection keys off the
full-segment signature, so a parts-only update reads as unchanged; LL-HLS
must fold part progression into change-detection or switch to blocking reload.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
