New features:
- llm module: use CC subscription as direct LLM proxy (llm::query/query_stream)
- WebSocket: production-grade reconnection (exponential backoff, sleep detection, replay buffer)
- session_id support (PR #14 by @flazouh)
- CPU spin fix in control handler (PR #12 by @funsocietyhq)

Fixes: query stdin(null), env handling, --tools/--setting-sources in print mode

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>