feat(security): add CSRF protection for all state-changing API routes

- Synchronizer token stored in session; GET /auth/csrf to obtain it
- csrfProtection middleware requires X-CSRF-Token on non-safe methods
- customFetch injects the header via setCsrfTokenGetter
- toolrate boot loads token; reload after local login (session regenerate)
- OpenAPI GET /auth/csrf + CsrfToken schema, orval regenerated

lib/api-client-react/src/index.ts

@@ -1,4 +1,4 @@
 export * from "./generated/api";
 export * from "./generated/api.schemas";
-export { setBaseUrl, setAuthTokenGetter, customFetch } from "./custom-fetch";
+export { setBaseUrl, setAuthTokenGetter, setCsrfTokenGetter, customFetch } from "./custom-fetch";
 export type { AuthTokenGetter } from "./custom-fetch";