Deletes every seg-* shard in a session's folder, leaving the consolidated recording.* file. Called
after StoreRealtimeRecording writes the canonical file at end of call. The recovery path
(RecoverRealtimeRecordingFromSegments) does not use this: it deletes only the shards it listed
and assembled, so a shard written after its listing is not lost. Never throws.
Deletes every
seg-*shard in a session's folder, leaving the consolidatedrecording.*file. Called after StoreRealtimeRecording writes the canonical file at end of call. The recovery path (RecoverRealtimeRecordingFromSegments) does not use this: it deletes only the shards it listed and assembled, so a shard written after its listing is not lost. Never throws.