1. threads.yaml race condition: reload threads index after agent subprocess
completes before updating head pointer (cli-uwf/commands/thread.ts)
2. evaluateJsonata not awaited: jsonata evaluate() returns Promise for async
expressions — now properly awaited (uwf-moderator/evaluate.ts)
3. resolveWorkflowHash dead code: function always returns a value, removed
impossible null return type and dead null-check branches at call sites
(cli-uwf/store.ts, commands/thread.ts, commands/workflow.ts)