v0.1.3

Fixes

• Drop phantom memtomem runtime dependency — pyproject.toml listed memtomem>=0.1,<0.2 as a runtime dep, violating the "no Python-level dependency on core" invariant. Removed along with 17 transitive packages (including langfuse which was accidentally pulled in via this path). Langfuse is now correctly available only through memtomem-stm[langfuse] optional extra.

New

• Langfuse proxy_call span — ProxyManager.call_tool() wrapped in a Langfuse observation when configured
• Notebook 00 — CLI + MCP hybrid prelude notebook
• 4 tutorial notebooks (00–03) — scenario-based, fully hermetic, no external services
• CLAUDE.md — project instructions for Claude Code

Infrastructure

• Surfacing feedback DB path now configurable via MEMTOMEM_STM_SURFACING__FEEDBACK_DB_PATH
• Fake LTM fixtures hardened against sha256(content) dedup with per-call UUIDs