Can i sue the arbitrator or receive any compensation

You may be able to appeal the ruling, speak with a local employment attorney or your union about your options.

I would not expect it to be an issue.

Is the below type of employment allowed during an OPT STEM 24-Months Extension?

You may receive more answers to your question if you post it again under the immigration law heading.

Am I a convicted felon and will my charge show up as a felony or a misdemeanor?

Different background checks go to different levels of depth.

Do all employers report wages to the state for their employees as long as they are working on the books?

Yes, it is a requirement that employers report.

Do I have grounds for a retaliation law suit against previous employer?

Did you complain of disability discrimination or an issue of failure to accommodate for your condition?

My article 78 was adjudicated and the decision is final, can I use any other resources to get back reinstated to my job?

If you have a viable ground for appeal, then you could appeal.

Employer is the entity that issues the paycheck.

Can an employer be "too busy" to do a performance review after the contracted 90 Day Probationary Period?

Without a contract stating otherwise, there would be no means to force the evaluation.

II have not had a raise in 4yrs when they handbook states I get an evaluation every six months but no evaluation every happens?

Do you have a union? If not, do you feel this refusal to evaluate you or consider you for a raise is motivated by some form of discrimination?