Checkpoint-and-continue: supervised runs batch questions instead of blocking

[Jammy2211]

Overview

Task 5 of the autonomy series (prompt: PyAutoMind/issued/5_checkpoint_and_continue.md): generalize register_and_iterate's proven pattern — at a judgment gate, write an answerable-cold question to the issue, park the task awaiting-input, and advance — into the contract's operational mechanics for all supervised --auto runs.

Plan

• AUTONOMY.md: new "Checkpoint-and-continue (supervised)" section — trigger (judgment gates per the levels table), question format (one batched comment per pause, context to answer cold), parking (active.md status: awaiting-input + question: pointer), continue policy (next independent step → next queued task → end cleanly), resume (from active.md, any environment).
• start_dev.md --auto item 3: link the section (supervised becomes real).
• register_and_iterate.md: its autonomy contract now points at the general pattern (single source).
• PyAutoMind README active.md schema: awaiting-input status + optional question: key (ship-time mind: commit).

Branch: feature/checkpoint-continue · Worktree: ~/Code/PyAutoLabs-wt/checkpoint-continue/