feat(secret-rotation): changed to mysql2 client and refactored queue util functions

backend/package.json

@@ -37,7 +37,7 @@
     "libsodium-wrappers": "^0.7.10",
     "lodash": "^4.17.21",
     "mongoose": "^7.4.1",
-    "mysql": "^2.18.1",
+    "mysql2": "^3.6.2",
     "nanoid": "^3.3.6",
     "node-cache": "^5.1.2",
     "nodemailer": "^6.8.0",
@@ -105,7 +105,6 @@
     "@types/jmespath": "^0.15.1",
     "@types/jsonwebtoken": "^8.5.9",
     "@types/lodash": "^4.14.191",
-    "@types/mysql": "^2.15.23",
     "@types/node": "^18.11.3",
     "@types/nodemailer": "^6.4.6",
     "@types/passport": "^1.0.12",