feat: add independent Bell authentication and RBAC (#12)

Bell/server/internal/platform/http.go

@@ -28,6 +28,8 @@ func NewHTTPApp(db *pgxpool.Pool) *HTTPApp {
 	return app
 }
 
+func (a *HTTPApp) Router() *http.ServeMux { return a.Mux }
+
 func (a *HTTPApp) Handler() http.Handler {
 	return securityHeaders(a.Mux)
 }