-- Migration 027: Add transcript storage for session recovery
-- Purpose: Store full JSONL transcripts from Claude Code for session recovery (CF-580)
-- Context: Replace daemon-based notes syncing with direct transcript ingestion

-- Add columns to sessions table for transcript storage
ALTER TABLE sessions
  ADD COLUMN IF NOT EXISTS transcript_jsonl TEXT,
  ADD COLUMN IF NOT EXISTS transcript_ingested_at TIMESTAMPTZ,
  ADD COLUMN IF NOT EXISTS transcript_file_path TEXT;

-- Index for efficient querying of ingested sessions
CREATE INDEX IF NOT EXISTS idx_sessions_transcript_ingested
  ON sessions(transcript_ingested_at)
  WHERE transcript_ingested_at IS NOT NULL;

-- Index for finding sessions by transcript file path (for recovery)
CREATE INDEX IF NOT EXISTS idx_sessions_transcript_file_path
  ON sessions(transcript_file_path)
  WHERE transcript_file_path IS NOT NULL;

-- Comments for documentation
COMMENT ON COLUMN sessions.transcript_jsonl IS 'Full JSONL transcript from Claude Code for complete session audit trail';
COMMENT ON COLUMN sessions.transcript_ingested_at IS 'Timestamp when transcript was ingested into database';
COMMENT ON COLUMN sessions.transcript_file_path IS 'Path to source JSONL file for debugging and recovery';