feat: disciple link

internal/model/social.go

@@ -152,6 +152,9 @@ type PublicProfile struct {
 	JoinedAt      time.Time `json:"joined_at"`
 	PostCount     int       `json:"post_count"`
 	BookmarkCount int       `json:"-"` // never serialized — private
+	// IsDirectDisciple marks an account an admin has linked to the disciples
+	// directory — one of Śrīla Prabhupāda's own initiated disciples.
+	IsDirectDisciple bool `json:"is_direct_disciple"`
 }
 
 // RelationshipState is the viewer's relationship to a target profile,