Function logTurnToHistory

logTurnToHistory(
    entry: TranscriptEntry,
    turnNumber: number,
    sessionDir: string,
    buffer: SessionHistoryBuffer,
): Promise<void>
Log a turn to history using buffer (fast, no read-modify-write)
Parameters
- entry: TranscriptEntry
  the transcript entry to log
- turnNumber: number
  the turn number (1-based)
- sessionDir: string
  path to the session directory
- buffer: SessionHistoryBuffer
  buffer for batched writes
Returns Promise<void>
- Defined in utils.ts:538