[Reputation Oracle] Revisit business logic

[Dzeranov]

Description
Need to revisit business logic in reputation oracle.

Motivation

1. To make sure that everything works as intended.
2. To make sure that we're following best practices and our code is easy to understand and expandable if necessary.

Implementation details
Revisit all the modules:

• common
• sendgrid email
• health
• web3
• hCaptcha
• user (in progress)
• kyc (in progress)
• nda
• qualification
• reputation
• auth
• webhook
• escrow-completion
• storage
• payout
• cron-job