feat(save): reconcile structured fields in save-issue and save-all

The four structured savers now run from the save engine. pearl--save-field-thunks queues a priority / state / assignee / labels saver for each dirty structured field alongside title, description, and comments, so save-issue and save-all reconcile a changed cookie, keyword-picker id, assignee, or label set at save time like any other edit. save-all's confirm prompt and the dirty-scan gate both count the structured fields, and a new pearl--issue-has-dirty-fields-p replaces the title/description/comment check that was duplicated in save-issue and the file-wide scan.

This is the commit that turns the engine on. The old immediate-push setters still exist until the next commit retires them, so for this one commit both paths are live — the setter cutover and the org-sync removal follow.

0 files changed, 0 insertions, 0 deletions