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/job-discovery.test.tsx

@@ -10,7 +10,7 @@ const mockedApi = api as jest.Mocked<typeof api>;
 
 test("searches NAV and offers the existing reviewed save flow", async () => {
   mockedApi.get.mockResolvedValue({ data: [{ id: "abc", title: "Backend Developer", company: "Acme", location: "OSLO", url: "https://arbeidsplassen.nav.no/stillinger/stilling/abc", source: "nav", countryCode: "NO" }] } as any);
-  render(<MemoryRouter><JobDiscoveryPage /></MemoryRouter>);
+  render(<MemoryRouter future={{ v7_startTransition: true, v7_relativeSplatPath: true }}><JobDiscoveryPage /></MemoryRouter>);
 
   fireEvent.change(screen.getByLabelText("Role or company"), { target: { value: "backend" } });
   fireEvent.click(screen.getByRole("button", { name: "Search NAV" }));