Cannot read .indexOf undefined on matchesKeyConstraints when attribute missing

New Issue Checklist

• I am not disclosing a vulnerability.
• I am not just asking a question.
• I have searched through existing issues.
• I can reproduce the issue with the latest version of Parse Server.

Issue Description

When an object is missing an expected attribute, an unhandled error occurs.

Steps to reproduce

To be honest, I'm not sure how objects are getting malformed.

This issue is causing a crash my LiveQueryServer that listens for live queries using ParseServer.createLiveQueryServer.

Actual Outcome

Because it's outside of the context of an Express.js request, the entire node process crashes.

Expected Outcome

I'm expecting it not to crash

Failing Test Case / Pull Request

• 🤩 I submitted a PR with a fix and a test case.
• 🧐 I submitted a PR with a failing test case.

Environment

Server

• Parse Server version: 4.5.0
• Operating system: Debian
• Local or remote host (AWS, Azure, Google Cloud, Heroku, Digital Ocean, etc): AWS

Database

• System (MongoDB or Postgres): MongoDB
• Database version: 4.4
• Local or remote host (MongoDB Atlas, mLab, AWS, Azure, Google Cloud, etc): FILL_THIS_OUT

Client

• SDK (iOS, Android, JavaScript, PHP, Unity, etc): JavaScript
• SDK version: n/a

Logs

Start at matchesKeyConstraints and trace its callers from ParseServer.createLiveQueryServer, focusing on the missing-attribute path described in the reproduction. Reproduce the LiveQueryServer crash with an object lacking the expected attribute, then verify the submitted fix and test case prevent the unhandled process crash.