List workflow stage threads
AL
8d ago+141+141+012345678901234567890123456789-1-1-0123456789
Adds hey workflow stage view <workflow-id> <stage-id> to list the threads currently in a workflow stage. Table output shows thread ID, subject, and email count; JSON includes stage metadata and topic IDs for hey thread read. Markdown output renders a thread table. --ids-only and --count support scripting.
Uses the upstream HEY SDK v0.30.0, which includes basecamp/hey-sdk#141. Removes the temporary personal-fork replacement, merges current main, and moves the command documentation into docs/cli.md.
Validation: make check (golangci-lint v2.13.2 locally), make build replace-check, and workflow tests with the race detector. A read-only live check of an existing stage returned four threads, with matching JSON and --count output.