Add public GET /v1/whitelist/pubkeys for active subscriber pubkeys

Expose JSON array of hex pubkeys backed by ListActivePubkeys query.
Includes OpenAPI documentation and integration tests.

Made-with: Love

internal/http/server.go

@@ -65,6 +65,7 @@ func NewServer(d Deps) *http.Server {
 
 	r.Route("/v1", func(r chi.Router) {
 		r.Get("/pricing", pricing.Handle)
+		r.Get("/whitelist/pubkeys", users.ListWhitelistedPubkeys)
 		r.Get("/users/{pubkey}", users.Get)
 		r.Get("/usernames/{name}/available", usernames.Available)
 		if d.Invoices != nil {