feat: JSON-LD graph, breadcrumbs and hreflang in the resolve answer (tracer)

- classes/schema builds one @graph per page (WebPage, article, profile,
  service, BreadcrumbList, VideoObject, WebSite, publisher) linked by @id
- breadcrumb trail through the primary parent chain, hreflang alternates
  with x-default, html_lang and og:locale in the resolve answer
- migration 202610280004 adds the publisher, local business, home crumb
  and pagination settings columns

models/settings.go

@@ -63,6 +63,23 @@ type VerifyFile struct {
 	Body     string `json:"body"`
 }
 
+// The publisher types (D-45) and the page address forms (D-40).
+const (
+	PublisherOrganization = "organization"
+	PublisherPerson       = "person"
+	PageFormQuery         = "query"
+	PageFormPath          = "path"
+	DefaultLocalType      = "LocalBusiness"
+)
+
+// OpeningHours is one opening-hours row of a local business: a day (mon
+// … sun) and its opening and closing time (24-hour HH:MM).
+type OpeningHours struct {
+	Day    string `json:"day"`
+	Opens  string `json:"opens"`
+	Closes string `json:"closes"`
+}
+
 // DefaultQueryParams is the seeded D-07 list.
 func DefaultQueryParams() []QueryParam {
 	return []QueryParam{
@@ -105,6 +122,38 @@ type Settings struct {
 	LinksNewTab      bool   `gorm:"column:links_new_tab"`
 	NofollowDomains  string `gorm:"column:nofollow_domains"`
 	SponsoredDomains string `gorm:"column:sponsored_domains"`
+	// BreadcrumbHome is the home crumb's name (translatable; empty: the
+	// per-locale default copy).
+	BreadcrumbHome string `gorm:"column:breadcrumb_home"`
+	// PageForm is the paginated address form, query (?page=N) or path
+	// (/<segment>/N); PageSegment the path segment, translatable per
+	// locale; the suffixes are added on page 2 and later (D-40, D-41).
+	PageForm              string `gorm:"column:page_form"`
+	PageSegment           string `gorm:"column:page_segment"`
+	PageTitleSuffix       string `gorm:"column:page_title_suffix"`
+	PageDescriptionSuffix string `gorm:"column:page_description_suffix"`
+	// The publisher of the site (D-45): organization or person, its name
+	// (translatable; empty: the site name), logo or photo, website, email,
+	// phone and sameAs profiles (one https URL per line).
+	PublisherType   string `gorm:"column:publisher_type"`
+	PublisherName   string `gorm:"column:publisher_name"`
+	PublisherLogo   string `gorm:"column:publisher_logo"`
+	PublisherURL    string `gorm:"column:publisher_url"`
+	PublisherEmail  string `gorm:"column:publisher_email"`
+	PublisherPhone  string `gorm:"column:publisher_phone"`
+	PublisherSameAs string `gorm:"column:publisher_same_as"`
+	// The local business data of an organisation publisher (D-45).
+	LocalEnabled    bool                            `gorm:"column:local_enabled"`
+	LocalType       string                          `gorm:"column:local_type"`
+	LocalPriceRange string                          `gorm:"column:local_price_range"`
+	LocalStreet     string                          `gorm:"column:local_street"`
+	LocalPostalCode string                          `gorm:"column:local_postal_code"`
+	LocalCity       string                          `gorm:"column:local_city"`
+	LocalRegion     string                          `gorm:"column:local_region"`
+	LocalCountry    string                          `gorm:"column:local_country"`
+	LocalLatitude   string                          `gorm:"column:local_latitude"`
+	LocalLongitude  string                          `gorm:"column:local_longitude"`
+	LocalHours      lagoon.Jsonable[[]OpeningHours] `gorm:"column:local_hours"`
 	// RoutesReportedAt is the time of the newest route report (D-33),
 	// written by the report only.
 	RoutesReportedAt *time.Time `gorm:"column:routes_reported_at"`
@@ -142,9 +191,15 @@ func DefaultSettings() Settings {
 		URLHost:       HostKeep,
 		URLSlash:      SlashKeep,
 		LinksNewTab:   true,
+		PageForm:      PageFormQuery,
+		PublisherType: PublisherOrganization,
+		LocalType:     DefaultLocalType,
 	}
 }
 
+// Hours returns the local business's opening hours.
+func (s Settings) Hours() []OpeningHours { return s.LocalHours.Get() }
+
 // Params returns the query-parameter list.
 func (s Settings) Params() []QueryParam { return s.QueryParams.Get() }