feat: complete release readiness work

- consolidate API ownership and remove dead vendor code

- add Stripe billing, learning paths, and public CV hardening

- add migration, recovery, security, audit, and browser gates

job-tracker-ui/src/cv-builder-deep-link.test.tsx

@@ -40,7 +40,7 @@ function renderAt(id: number) {
   return render(
     <I18nProvider>
       <ToastProvider>
-        <MemoryRouter initialEntries={[`/career/builder/${id}`]}>
+        <MemoryRouter initialEntries={[`/career/builder/${id}`]} future={{ v7_startTransition: true, v7_relativeSplatPath: true }}>
           <Routes>
             <Route path="/career/builder/:id" element={<CvBuilderEditor />} />
           </Routes>