handle_verdict(rejected): the reason is now pulled from the issue latest Plane
comment (_latest_comment_reason: GET comments, newest by created_at, HTML
stripped) instead of a fixed stub. Slava writes the reason in a comment before
flipping the status to Rejected. Falls back to a fixed note when there is no
comment / the API call fails.
tests: add test_status_only_verdict.py (test_inreview_comment_does_not_revert
[bug 3 root], test_any_comment_no_pipeline_action,
test_approved_status_advances_without_inprogress_reset,
test_rejected_status_pulls_reason_from_comment) and
test_inprogress_from_needs_input_relaunches_analyst in test_status_trigger.py.
Rewrote the comment-based tests (test_verdict_status, test_plane_approved/
rejected in test_webhooks) under the status-only model: comments are no-ops,
verdicts come from status changes.
Feature 1. work_item.created no longer starts the pipeline (soft QG-0 log only);
the issue stays in the backlog until moved to In Progress. The pipeline-start body
is extracted into start_pipeline(); a new issue updated handler routes a state
change to In Progress -> handle_status_start, which is idempotent: an existing task
for the plane_id is NOT re-created or restarted (protects handle_comment, which also
flips issues to In Progress). Real Plane payload: event=issue, action=updated,
data.state.id. Existing m6/plane_webhook/dedup tests updated to drive the new
trigger; new test_status_trigger.py covers created-no-op / start / idempotent.
