docs: update CLAUDE.md for v0.5.0 restructure

0.5.0

refactor: restructure into smaller files and folders

0.4.2

refactor: fix N+1 queries, scope bugs, and dead code from code review

0.4.1

fix: scope-aware recall pipeline — stop cross-topic memory leaks

0.4.0

docs: add book ingestion pipeline + connection hints to CLAUDE.md and README

feat: connection hints in search + book ingestion pipeline

0.3.5

revert: remove non-functional subagent_spawning hook

0.3.4

fix: use api.on() not api.hooks.register() for subagent_spawning hook

0.3.3