docs: registrar fluxo do updater e atualizar chaves

prisma/migrations/20251012062518_add_machine_persona/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE "AuthUser" ADD COLUMN "machinePersona" TEXT;

prisma/schema.prisma

@@ -217,6 +217,7 @@ model AuthUser {
   role           String        @default("agent")
   tenantId       String?
   avatarUrl      String?
+  machinePersona String?
   createdAt      DateTime      @default(now())
   updatedAt      DateTime      @updatedAt
   sessions       AuthSession[]