feat: Compute hash on item upsert (#404)

* feat: Compute hash on item upsert

* fix: Fix tests & urn building

* fix: Return the content_hash when upserting the item

* chore: Change the content hash column name

* fix: Compute the hash as its done in the Catalyst. Fix some tests

* fix: Tests

* fix: Wrong types

* fix: Remove useFakeTimers

* fix: Simplified the retrieval of local_content_hash in the third party item upsert

* fix: EntityMetadata types

* fix: Fix content hash

* fix: Verify that the item is published

* fix: Add rarity to the StandardWearableEntityMetadata

* fix: Tests

* fix: Link Wearable type to the entities type

migrations/1644869327994_add-column-to-store-content-hash.ts

@@ -0,0 +1,16 @@
+import { MigrationBuilder } from 'node-pg-migrate'
+import { Item } from '../src/Item/Item.model'
+
+const tableName = Item.tableName
+const columnName = 'local_content_hash'
+
+export async function up(pgm: MigrationBuilder): Promise<void> {
+  pgm.addColumn(tableName, {
+    // Content-hash can be null if the item is not yet published for the DCL collections
+    [columnName]: { type: 'string', notNull: false },
+  })
+}
+
+export async function down(pgm: MigrationBuilder): Promise<void> {
+  pgm.dropColumn(tableName, columnName)
+}