New features:
- terraphim_sessions crate: Session management for AI coding assistant history
- /sessions REPL commands: sources, import, list, search, stats, show, concepts, related, timeline, export, enrich
- Supports Claude Code, Cursor, and Aider session sources
- Knowledge graph enrichment for session analysis

Published crates:
- terraphim-session-analyzer v1.6.0
- terraphim_sessions v1.6.0
- terraphim_agent v1.6.0

Co-Authored-By: Terraphim AI <noreply@terraphim.ai>