feat(fayda): add fayda verification endpoints and login-with-fayda

apps/edr-passenger-api/prisma/migrations/20260526110803_add_fayda_login_authcode_and_platform/migration.sql

@@ -0,0 +1,12 @@
+/*
+  Warnings:
+
+  - A unique constraint covering the columns `[authCode]` on the table `FaydaVerificationSession` will be added. If there are existing duplicate values, this will fail.
+
+*/
+-- AlterTable
+ALTER TABLE "FaydaVerificationSession" ADD COLUMN     "authCode" TEXT,
+ADD COLUMN     "platform" TEXT NOT NULL DEFAULT 'WEB';
+
+-- CreateIndex
+CREATE UNIQUE INDEX "FaydaVerificationSession_authCode_key" ON "FaydaVerificationSession"("authCode");

apps/edr-passenger-api/prisma/schema.prisma

@@ -1261,6 +1261,7 @@ model FaydaVerificationSession {
   state            String    @unique
   codeVerifier     String
   purpose          String    @default("PURCHASE")
+  platform         String    @default("WEB") // WEB | MOBILE — recorded for audit
   saveToAccount    Boolean   @default(false)
   status           String    @default("PENDING")
   errorCode        String?