RecordDeleted marks the listed rows it excludes and RecordSaved the rows
whose lastmod it moves (indexnow_pending_at); the next rebuild sends
them to IndexNow as removed or changed and clears the marks. RecordSaved
checks for a nil event before reading it. TestIndexNow now deletes and
edits through the record events, as the admin does.
- migration 202610280004: image_file_no, kind, published_at and parent_refs
on the slot table; the image, News, IndexNow and HTML sitemap settings
- the rebuild stores each page's featured and body images (absolute on the
site, deduplicated, at most 1000) and numbers the rows with images into
sitemap-images-<n>.xml with the per-type files' stable rules
- the index lists the image files while images_enabled is on; the files
route serves them with image:image and image:loc only
- contract package: Filter, Listing and their types (D-95)
- golem15_sitemap_urls slot table and the new settings columns
- Rebuild over signpost Records, stable slot assignment, rebuild job
- GET /sitemap.xml index and GET /_sitemap/files/{file} from the table
