feat: add typescript monorepo with pnpm workspaces and prisma database package

- root package.json + pnpm-workspace.yaml + tsconfig.base.json
- packages/types: canonical enums (TenantStatus, AgentState)
- packages/shared: re-exports types, base for future utilities
- packages/database: Prisma 7 schema with driver adapter (pg), initial
  tenants table matching agente.md section 29, first migration applied

packages/database/prisma/migrations/20260828022204_init/migration.sql

@@ -0,0 +1,28 @@
+-- CreateEnum
+CREATE TYPE "tenant_status" AS ENUM ('TRIAL', 'ACTIVE', 'SUSPENDED', 'PAST_DUE', 'CANCELLED');
+
+-- CreateTable
+CREATE TABLE "tenants" (
+    "id" UUID NOT NULL,
+    "code" TEXT NOT NULL,
+    "slug" TEXT NOT NULL,
+    "legal_name" TEXT NOT NULL,
+    "trade_name" TEXT,
+    "tax_id" TEXT,
+    "status" "tenant_status" NOT NULL DEFAULT 'TRIAL',
+    "timezone" TEXT NOT NULL DEFAULT 'America/Sao_Paulo',
+    "locale" TEXT NOT NULL DEFAULT 'pt-BR',
+    "billing_currency" TEXT NOT NULL DEFAULT 'BRL',
+    "telephony_domain" TEXT,
+    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updated_at" TIMESTAMP(3) NOT NULL,
+    "deleted_at" TIMESTAMP(3),
+
+    CONSTRAINT "tenants_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "tenants_code_key" ON "tenants"("code");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "tenants_slug_key" ON "tenants"("slug");

packages/database/prisma/migrations/migration_lock.toml

@@ -0,0 +1,3 @@
+# Please do not edit this file manually
+# It should be added in your version-control system (e.g., Git)
+provider = "postgresql"

packages/database/prisma/schema.prisma

@@ -0,0 +1,36 @@
+generator client {
+  provider = "prisma-client-js"
+}
+
+datasource db {
+  provider = "postgresql"
+}
+
+enum TenantStatus {
+  TRIAL
+  ACTIVE
+  SUSPENDED
+  PAST_DUE
+  CANCELLED
+
+  @@map("tenant_status")
+}
+
+model Tenant {
+  id               String       @id @default(uuid()) @db.Uuid
+  code             String       @unique
+  slug             String       @unique
+  legalName        String       @map("legal_name")
+  tradeName        String?      @map("trade_name")
+  taxId            String?      @map("tax_id")
+  status           TenantStatus @default(TRIAL)
+  timezone         String       @default("America/Sao_Paulo")
+  locale           String       @default("pt-BR")
+  billingCurrency  String       @map("billing_currency") @default("BRL")
+  telephonyDomain  String?      @map("telephony_domain")
+  createdAt        DateTime     @default(now()) @map("created_at")
+  updatedAt        DateTime     @updatedAt @map("updated_at")
+  deletedAt        DateTime?    @map("deleted_at")
+
+  @@map("tenants")
+}