Adds docs/SESSION_HANDOFF_2026-07-30.md with what a future session
needs that isn't derivable from git log: open threads (release DAG
unverified end-to-end, engine_history/quantengine schema collision
left as-is, OpenDART/KRX not yet wired into any workflow) and traps
hit this session worth not repeating (archive-before-grepping
tools/spec/tests, DbUp ordinal sort, runtime/ is tracked history not
scratch space, two Pythons on this machine, entropy audit counting
local build noise). Pointed to it from CLAUDE.md's Known Issues list.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
