refactor: migrate pricing entities to DML models (#10335)

Fixes: FRMW-2810

## Breaking changes
There is only one breaking change

- The `min_quantity` and `max_quantity` properties are now consistently typed as numbers. Earlier, it was [typed as numbers](https://github.com/medusajs/medusa/blob/develop/integration-tests/http/__tests__/price-list/admin/price-list.spec.ts#L68-L69) in some API responses and as [string in others](https://github.com/medusajs/medusa/blob/develop/integration-tests/http/__tests__/price-list/admin/price-list.spec.ts#L186-L187). I did not go to the bottom of this inconsistency, but the tests reveals them.

Co-authored-by: Adrien de Peretti <25098370+adrien2p@users.noreply.github.com>

packages/modules/pricing/src/models/price-preference.ts

@@ -1,75 +1,19 @@
-import {
-  createPsqlIndexStatementHelper,
-  DALUtils,
-  generateEntityId,
-} from "@medusajs/framework/utils"
-import {
-  BeforeCreate,
-  Entity,
-  Filter,
-  OnInit,
-  PrimaryKey,
-  Property,
-} from "@mikro-orm/core"
+import { model } from "@medusajs/framework/utils"
 
-export const uniquePreferenceRuleIndexName =
-  "IDX_price_preference_attribute_value"
-const UniquePreferenceRuleIndexStatement = createPsqlIndexStatementHelper({
-  name: uniquePreferenceRuleIndexName,
-  tableName: "price_preference",
-  columns: ["attribute", "value"],
-  unique: true,
-  where: "deleted_at IS NULL",
-})
-
-const DeletedAtIndex = createPsqlIndexStatementHelper({
-  tableName: "price_preference",
-  columns: "deleted_at",
-  where: "deleted_at IS NOT NULL",
-})
-
-@Entity()
-@Filter(DALUtils.mikroOrmSoftDeletableFilterOptions)
-@UniquePreferenceRuleIndexStatement.MikroORMIndex()
-export default class PricePreference {
-  @PrimaryKey({ columnType: "text" })
-  id: string
-
-  @Property({ columnType: "text" })
-  attribute: string
-
-  @Property({ columnType: "text", nullable: true })
-  value: string | null = null
-
-  @Property({ default: false })
-  is_tax_inclusive: boolean
-
-  @Property({
-    onCreate: () => new Date(),
-    columnType: "timestamptz",
-    defaultRaw: "now()",
+const PricePreference = model
+  .define("PricePreference", {
+    id: model.id({ prefix: "prpref" }).primaryKey(),
+    attribute: model.text(),
+    value: model.text().nullable(),
+    is_tax_inclusive: model.boolean().default(false),
   })
-  created_at: Date
+  .indexes([
+    {
+      name: "IDX_price_preference_attribute_value",
+      on: ["attribute", "value"],
+      unique: true,
+      where: "deleted_at IS NULL",
+    },
+  ])
 
-  @Property({
-    onCreate: () => new Date(),
-    onUpdate: () => new Date(),
-    columnType: "timestamptz",
-    defaultRaw: "now()",
-  })
-  updated_at: Date
-
-  @DeletedAtIndex.MikroORMIndex()
-  @Property({ columnType: "timestamptz", nullable: true })
-  deleted_at: Date | null = null
-
-  @BeforeCreate()
-  onCreate() {
-    this.id = generateEntityId(this.id, "prpref")
-  }
-
-  @OnInit()
-  onInit() {
-    this.id = generateEntityId(this.id, "prpref")
-  }
-}
+export default PricePreference