docs: sync docs with upstream

docs: simplify ralph smoke instructions

docs: note ralph smoke fixture

fix: make smoke task description explicit

fix: fallback to temp review receipts

fix: make smoke task produce reviewable diff

feat: add ralph smoke fixture script

fix: ignore ralph run logs

Revert "docs: fix smoke setup notes"

docs: fix smoke setup notes

fix: extend opencode mcp timeout

docs: clarify smoke acceptance file

fix: extend opencode provider timeout

docs: add smoke test setup notes

docs: extend ralph bash timeout