v0.5.0 — Health, Snapshots, Type Hints

v0.5.0

New Tools

• health � Project health summary (pytest, mypy, ruff, code metrics)
• snapshot � Workspace context capture for MemPalace auto-save

Improvements

• Full type hints on all 8 core tools
• All tools now pass mypy with zero errors
• CI expanded with health/snapshot checks

Meta

• 12 tools, 320+ tests, all smoke tests passing
• Version bumped from 0.4.0 to 0.5.0