chore(): Downgrade mikro orm (performance regression) (#13680)

**What**
After lot of investigation, we finally found one of our performance regerssion point (see [here](https://github.com/mikro-orm/mikro-orm/issues/6905)), this pr downgrade mikro orm and move the strategy back to select in where needed

packages/deps/package.json

@@ -37,11 +37,11 @@
     "build": "rimraf dist && tsc --build"
   },
   "dependencies": {
-    "@mikro-orm/cli": "6.5.5",
-    "@mikro-orm/core": "6.5.5",
-    "@mikro-orm/knex": "6.5.5",
-    "@mikro-orm/migrations": "6.5.5",
-    "@mikro-orm/postgresql": "6.5.5",
+    "@mikro-orm/cli": "6.4.16",
+    "@mikro-orm/core": "6.4.16",
+    "@mikro-orm/knex": "6.4.16",
+    "@mikro-orm/migrations": "6.4.16",
+    "@mikro-orm/postgresql": "6.4.16",
     "@opentelemetry/instrumentation-pg": "^0.44.0",
     "@opentelemetry/resources": "^1.26.0",
     "@opentelemetry/sdk-node": "^0.53.0",