v2.3.0

Fixed

• LLM refinement crash: '<' not supported between instances of 'NoneType' and 'int' — sort keys in cmd_rebuild.py now use or 0 to handle SQLite NULL frequency/message_count values.

Changed

• fastembed>=0.4 and sqlite-vec>=0.1.6 moved from optional [vec] extra to core dependencies — vec/hybrid search works out of the box with no extra install step.
• [vec] and [llm] extras emptied (kept for backwards compatibility); ollama is an external daemon, not a Python package dep.
• Dev dep floors raised: pytest>=9, pytest-cov>=7, ruff>=0.15, mypy>=2, build>=1.5, twine>=6.
• Removed Operating System :: Microsoft :: Windows classifier (hooks are bash-only; no Windows CI).