v0.4.5 — Realistic per-tool cost estimates in usage stats

Changes since v0.4.2

v0.4.5

• Fix get_usage_stats: use per-tool cost multipliers instead of assuming every query reads the entire codebase
  • e.g. find_symbol estimates 5% of codebase, get_change_impact estimates 30%
  • Previously overstated savings by 10-50x

v0.4.4

• Strengthen CLAUDE.md instructions in README

v0.4.3

• Document get_usage_stats tool and clarify incremental reindexing in README