Document the realtime seam jump policy and refresh the realtime, coverage and audio service pages New page Realtime-Seam-Jump-Policy: the one decision taken at a chunk seam, the three policies, how to choose the ceiling, the candidate selection rule and the measurements. Realtime-Query-Command: how a stream URL is read by FFmpegAudioService, chunk length, the failure path (ErrorCallback, OfflineStorage, backoff), recommended broadcast settings, and the options list rewritten against RealtimeQueryConfiguration. Fix names that no longer exist: TrackMatchLengthEntryFilter, TrackRelativeCoverageLengthEntryFilter, OngoingRealtimeResultEntryFilter, OngoingSuccessCallback, QueryMatchLength, TrackCoverageLength, GaussianBlurNormalization. Permitted gap default is 2 s. FFmpeg matrix extended to 15.x.