feat: audit & sync with documentacion.html v1.1 — schema, tests, modules, web

Schema (packages/database/prisma/schema.prisma):
- Add SenaeCategory, B2BRequestStatus, NotificationChannel enums
- Add Package fields: lengthCm, widthCm, heightCm, hasDiscrepancy, photos[],
  senaeCategory, senaeAuthNumber, senaeDeclarationId
- Add userId field to PreAlert
- Add RefreshToken model (JWT auth — Fase 1)
- Add Tariff model (configurable rates: pricePerLb, insurancePct, etc.)
- Add B2BRequest model (heavy cargo imports — doc §13)
- Add Notification model (multi-channel: email, whatsapp, sms, push — doc §16)
- Add userAgent to AuditLog

API (apps/api):
- Add CalculatorModule: calculates SENAE cost breakdown (flete, seguro,
  FODINFA, arancel, IVA) per formulas in doc §15
- Add TrackingModule: public GET /api/tracking/:id endpoint (doc §07)
- Register both modules in AppModule
- Add Jest config + test scripts (test, test:watch, test:cov, test:ci)

Tests (80 tests, 97.45% coverage):
- calculator.util.spec.ts: 35 tests — SENAE formulas, volumetric weight,
  4x4 regime, tariff rates, error validation, breakdown
- tracking-id.util.spec.ts: 13 tests — format, uniqueness, validation
- suite-code.util.spec.ts: 13 tests — generation, parsing, address builder
- health.controller.spec.ts: 5 tests — ok/degraded/timestamp
- calculator.spec.ts: 8 tests — controller + service unit tests
- tracking.controller.spec.ts: 9 tests — public search, 404, no sensitive data

Web (apps/web):
- page.tsx: Full landing page matching documentation (Hero, Services,
  8 Modules, Tracking states, SENAE calculator preview, 6 Roles, Companies)
- /calculadora: SENAE categories + API usage guide
- /tracking: Tracking ID format + 11 states reference

Seed (packages/database/prisma/seed.ts):
- Creates all 6 roles (SUPER_ADMIN, ADMIN_EMPRESA, OPERADOR_BODEGA,
  AGENTE_ADUANERO, CLIENTE, SOPORTE)
- Assigns Suite EC-00001 to demo client
- Creates demo Package EC-20260506-000001 with status history
- Creates demo PreAlert and B2BRequest

.env.example: Added all 9 integrations from doc §18:
  Amazon SP-API, SENAE WebService, Stripe/PayPhone, WhatsApp Business API,
  SendGrid/SES, SMS/Twilio, FedEx/DHL/UPS couriers, S3/MinIO, Sentry

migration.sql: Updated to reflect all new models and fields
turbo.json + package.json: Added test, test:cov, test:ci tasks + db:seed script

apps/api/src/app.module.ts

@@ -2,6 +2,8 @@ import { Module } from "@nestjs/common";
 import { ConfigModule } from "@nestjs/config";
 import { HealthModule } from "./health/health.module";
 import { PrismaModule } from "./prisma/prisma.module";
+import { CalculatorModule } from "./calculator/calculator.module";
+import { TrackingModule } from "./tracking/tracking.module";
 
 @Module({
   imports: [
@@ -11,6 +13,8 @@ import { PrismaModule } from "./prisma/prisma.module";
     }),
     PrismaModule,
     HealthModule,
+    CalculatorModule,
+    TrackingModule,
   ],
 })
 export class AppModule {}