fix(index): index enum fields (#13428)

https://github.com/medusajs/medusa/issues/13372

What:
 - It handles enum fields corretly when added to filterable fields

integration-tests/modules/src/links/product-brand.ts

@@ -12,7 +12,7 @@ const link =
         },
         {
           linkable: BrandModule.linkable.brand.id,
-          filterable: ["id", "name"],
+          filterable: ["id", "name", "status"],
           isList: false,
         }
       )

integration-tests/modules/src/modules/brand/migrations/Migration20250805184935.ts

@@ -3,7 +3,7 @@ import { Migration } from "@mikro-orm/migrations"
 export class Migration20250805184935 extends Migration {
   override async up(): Promise<void> {
     this.addSql(
-      `create table if not exists "brand" ("id" text not null, "name" text not null, "created_at" timestamptz not null default now(), "updated_at" timestamptz not null default now(), "deleted_at" timestamptz null, constraint "brand_pkey" primary key ("id"));`
+      `create table if not exists "brand" ("id" text not null, "name" text not null, "status" text default 'active', "created_at" timestamptz not null default now(), "updated_at" timestamptz not null default now(), "deleted_at" timestamptz null, constraint "brand_pkey" primary key ("id"));`
     )
     this.addSql(
       `CREATE INDEX IF NOT EXISTS "IDX_brand_deleted_at" ON "brand" (deleted_at) WHERE deleted_at IS NULL;`

integration-tests/modules/src/modules/brand/models/brand.ts

@@ -3,4 +3,5 @@ import { model } from "@medusajs/utils"
 export const Brand = model.define("brand", {
   id: model.id({ prefix: "brand" }).primaryKey(),
   name: model.text(),
+  status: model.enum(["active", "inactive"]).default("active"),
 })