feat: sitemap index and per-type files from a slot table (tracer)

- 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

plugin.go

@@ -1,16 +1,15 @@
-// Package sitemap is the golem15.sitemap plugin: it serves /sitemap.xml
-// from the application's one sitemap definition, byte for byte the way the
-// WinterCMS Golem15.Sitemap plugin did, with items that are explicit URLs
-// or menu item types of the framework's registry.
+// Package sitemap is the golem15.sitemap plugin: it serves a sitemap index
+// at /sitemap.xml whose entries are per-group files of a configurable size
+// (sitemap-<slug>-<n>.xml, D-30), built from the published records of every
+// signpost content type and the additional addresses of its settings, with
+// stable file numbers and real lastmod. Other plugins narrow it through the
+// Filter of the contract package and read it through its Listing.
 package sitemap
 
 import (
 	"embed"
-	"fmt"
 	"io/fs"
-	"time"
 
-	"git.golem15.com/golem15/sm-sitemap-plugin/classes"
 	"git.golem15.com/golem15/sm-sitemap-plugin/console"
 	"git.golem15.com/golem15/sm-sitemap-plugin/models"
 	"git.golem15.com/golem15/sm-sitemap-plugin/updates"
@@ -29,28 +28,22 @@ var (
 	_ pact.HasModels      = (*Plugin)(nil)
 	_ pact.HasRoutes      = (*Plugin)(nil)
 	_ pact.HasCommands    = (*Plugin)(nil)
+	_ pact.HasJobs        = (*Plugin)(nil)
 	_ surf.BucketProvider = (*Plugin)(nil)
 )
 
 //go:embed config
 var configFS embed.FS
 
-// sitemapXSL is the PHP plugin's assets/sitemap.xsl, byte for byte.
-//
-//go:embed assets/sitemap.xsl
-var sitemapXSL []byte
-
 // Plugin is the golem15.sitemap plugin.
 type Plugin struct {
-	app   *backpack.App
-	tiers classes.Tiers
-	cache *sitemapCache
+	app *backpack.App
 }
 
 func (p *Plugin) ID() string { return "golem15.sitemap" }
 
-// Requires is empty: the sitemap reads content types through the framework's
-// menu item type registry, not from a named plugin.
+// Requires is empty: the sitemap reads content types through signpost, not
+// from a named plugin, and a Filter through the service registry.
 func (p *Plugin) Requires() []string { return nil }
 
 func (p *Plugin) Register(app *backpack.App) error {
@@ -58,29 +51,9 @@ func (p *Plugin) Register(app *backpack.App) error {
 	return nil
 }
 
-// Boot compiles the priority tier rules (classes.TiersConfigKey); a rule
-// with an unknown setting or a pattern that does not compile fails the boot.
-// It also starts an empty sitemap cache for CacheConfigKey seconds; a
-// negative value fails the boot.
+// Boot keeps the booted application for the routes, jobs and commands.
 func (p *Plugin) Boot(app *backpack.App) error {
 	p.app = app
-	var tiers classes.Tiers
-	var err error
-	seconds := 0
-	if app != nil {
-		tiers, err = classes.LoadTiers(app.Config)
-		if app.Config != nil {
-			seconds = app.Config.Int(CacheConfigKey)
-		}
-	}
-	if err != nil {
-		return fmt.Errorf("golem15.sitemap: %w", err)
-	}
-	if seconds < 0 {
-		return fmt.Errorf("golem15.sitemap: %s must not be negative, got %d", CacheConfigKey, seconds)
-	}
-	p.tiers = tiers
-	p.cache = newSitemapCache(time.Duration(seconds) * time.Second)
 	return nil
 }