feat(CF-580): Add schema support and metadata tracking for session notes recovery

- Migration 025: Add 'abandoned' status to sessions CHECK constraint (fixes blocking issue)
- Migration 026: Add recovery metadata columns (recovered_from, recovered_at) to track note recovery source
- Update sessionRecoverOrphaned to recover notes from temp files when marking sessions abandoned
- Update notes-parser to track recovery source and timestamp for analytics

These changes complete Priority 3, 5 and part of Priority 1 for CF-572 Session Notes Loss fix.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

migrations/025_add_abandoned_status.sql

@@ -0,0 +1,13 @@
+-- Migration 025: Add 'abandoned' status to sessions
+-- Purpose: Fix CF-572 schema constraint issue preventing orphan recovery
+-- Context: sessionRecoverOrphaned() tries to set status='abandoned' but constraint only allows 'active', 'completed', 'interrupted'
+
+ALTER TABLE sessions
+  DROP CONSTRAINT IF EXISTS sessions_status_check;
+
+ALTER TABLE sessions
+  ADD CONSTRAINT sessions_status_check
+  CHECK (status IN ('active', 'completed', 'interrupted', 'abandoned'));
+
+COMMENT ON CONSTRAINT sessions_status_check ON sessions
+  IS 'Valid session statuses including abandoned for orphaned sessions (CF-572)';

migrations/026_session_notes_recovery_metadata.sql

@@ -0,0 +1,16 @@
+-- Migration 026: Add recovery metadata to session_notes
+-- Purpose: Track which notes were recovered vs normally saved for CF-572 analytics
+
+ALTER TABLE session_notes
+  ADD COLUMN IF NOT EXISTS recovered_from TEXT,
+  ADD COLUMN IF NOT EXISTS recovered_at TIMESTAMP WITH TIME ZONE;
+
+CREATE INDEX IF NOT EXISTS idx_session_notes_recovered
+  ON session_notes(recovered_from)
+  WHERE recovered_from IS NOT NULL;
+
+COMMENT ON COLUMN session_notes.recovered_from
+  IS 'Source of recovery: "recovered" (daemon/orphan), "manual" (MCP tool), NULL (normal save)';
+
+COMMENT ON COLUMN session_notes.recovered_at
+  IS 'Timestamp when note was recovered (NULL for normal saves)';