feat: Passwordless cross-device authentication

- Arkitektur: docs/auth/passwordless-architecture.md
- Backend: iom/quixzoom-auth-service/ (FastAPI + Redis)
- Webb: quixzoom-market-pages/se/login/ (QR-kod + polling)
- App: iom/quixzoom-app/src/features/auth/ (push + deep links)

Flöde: QR-kod → app-godkännande → webb-inloggad

landvex/node_modules/express-validator/lib/middlewares/exact.d.ts

@@ -0,0 +1,29 @@
+import { ErrorMessage, Location, Middleware, UnknownFieldMessageFactory } from '../base';
+import { ContextRunner, ValidationChain } from '../chain';
+type CheckExactOptions = {
+    /**
+     * The list of locations which `checkExact()` should check.
+     * @default ['body', 'params', 'query']
+     */
+    locations?: readonly Location[];
+    message?: UnknownFieldMessageFactory | ErrorMessage;
+};
+type CheckExactInput = ValidationChain | ValidationChain[] | (ValidationChain | ValidationChain[])[];
+/**
+ * Checks whether the request contains exactly only those fields that have been validated.
+ *
+ * Unknown fields, if found, will generate an error of type `unknown_fields`.
+ *
+ * @param chains either a single chain, an array of chains, or a mixed array of chains and array of chains.
+ *               This means that all of the below are valid:
+ * ```
+ * checkExact(check('foo'))
+ * checkExact([check('foo'), check('bar')])
+ * checkExact([check('foo'), check('bar')])
+ * checkExact(checkSchema({ ... }))
+ * checkExact([checkSchema({ ... }), check('foo')])
+ * ```
+ * @param opts
+ */
+export declare function checkExact(chains?: CheckExactInput, opts?: CheckExactOptions): Middleware & ContextRunner;
+export {};