feat: sase.tr v2 full application implementation

Complete rewrite of sase.tr VIN lookup platform with modern stack:

Backend (NestJS 10 + Drizzle ORM + PostgreSQL + Redis + BullMQ):
- 34 DB models (core + PL24 + EMEX schemas)
- Auth via Better Auth (email/password + social)
- Brands, Plans, Subscriptions, Payments (iyzico + EFT)
- VIN decode orchestration (Corgi + PL24 + EMEX + NHTSA)
- Interactive schema viewer backend (MinIO storage)
- EMEX scraping integration (Puppeteer + BullMQ workers)
- Translation module (EN→TR automotive dictionary)
- Admin dashboard API (stats, user mgmt, payment approval)
- Rate limiting, Helmet security, file upload validation

Frontend (Next.js 15 + Tailwind v4 + shadcn/ui + TanStack Query + Zustand):
- 20 routes: auth, dashboard, VIN search, schema viewer, admin
- Interactive schema viewer with zoom/pan/hotspot highlighting
- Subscription management with brand selector
- Payment flow (iyzico 3D Secure + EFT with receipt upload)
- i18n support (TR/EN)
- Error boundaries, loading skeletons, 404 page

Infrastructure:
- 85 tests (52 backend + 33 frontend, Vitest)
- CI/CD (GitHub Actions: lint, typecheck, test, build, deploy)
- Zero-downtime deploy script (PM2)
- Env validation script

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

apps/api/src/common/decorators/current-user.decorator.ts

@@ -0,0 +1,7 @@
+import { createParamDecorator, ExecutionContext } from "@nestjs/common";
+
+export const CurrentUser = createParamDecorator((data: string, ctx: ExecutionContext) => {
+  const request = ctx.switchToHttp().getRequest();
+  const user = request.user;
+  return data ? user?.[data] : user;
+});

apps/api/src/common/decorators/public.decorator.ts

@@ -0,0 +1,4 @@
+import { SetMetadata } from "@nestjs/common";
+
+export const IS_PUBLIC_KEY = "isPublic";
+export const Public = () => SetMetadata(IS_PUBLIC_KEY, true);

apps/api/src/common/decorators/roles.decorator.ts

@@ -0,0 +1,4 @@
+import { SetMetadata } from "@nestjs/common";
+
+export const ROLES_KEY = "roles";
+export const Roles = (...roles: string[]) => SetMetadata(ROLES_KEY, roles);

apps/api/src/common/decorators/throttle.decorator.ts

@@ -0,0 +1,16 @@
+import { Throttle } from "@nestjs/throttler";
+
+/**
+ * Auth routes: 5 requests per 60 seconds
+ */
+export const ThrottleAuth = () => Throttle({ default: { limit: 5, ttl: 60000 } });
+
+/**
+ * VIN decode routes: 20 requests per 60 seconds
+ */
+export const ThrottleVinDecode = () => Throttle({ default: { limit: 20, ttl: 60000 } });
+
+/**
+ * General routes: 100 requests per 60 seconds
+ */
+export const ThrottleGeneral = () => Throttle({ default: { limit: 100, ttl: 60000 } });