Agent Plugins 0.14.5

From the round-4 trials on 0.14.4 (an ESS retrofit of a stock-reservation service and worktree
onboarding, both isolated). The skills were checked against ess 0.31.0, the newest release, which
changes nothing they describe.

ess

• ess:retrofitting: a command the code silently ignores in some state gets no wrong_state:
  outcome and no error. synthesize then reports ESS-SYNTH-012 for that state and still writes
  a scenario requiring that nothing happened, which is the code's behaviour; report it, and do not
  add an error the code never raises. The view that invariants need is structural: mark it as such.

worktree

• worktree:init: the profile download creates its directory (curl --create-dirs) instead of a
  separate mkdir; any local file works as the profile although --help says "committed"; a
  headless run uses the directory that holds the current repository as the workspace root and
  says so.
• worktree:managing-worktrees: always pass --id to gc.