[vdsmon]

Sometimes I want to end a session for good, with no next session to pick it up. Today prep-exit always writes a handoff and a resume prompt, which is noise in that case. This adds a --close mode for a clean exit.

What changes

• /prep-exit --close (or "clean exit", "no handoff") runs the same audit and saves, then writes no handoff and no resume prompt.
• Findings go where they live for good: the project's notes, docs or issue tracker, else memory. The project memory entry is updated to today's state.
• It ties up loose ends without asking: merged worktrees and their branches (checked with git merge-base --is-ancestor), the session's watches and crons, and finished background output.
• Stopping a job that is still running still needs a yes.
• The report lists Saved, Tied up and Still open (with where each open item is recorded). It does not call the cc-wrap-up band.
• prep-exit goes to 0.4.0.

Tested

mise run verify passes (0 failures). mise run test passes all 4 offline suites. Not run live yet: reinstall the plugin to try it.