[Feature]: Add handling errors parameter to blocklist client

[MCJOHN974]

Feature - Add handling errors parameter to blocklist client

1. Description

Add a parameter hat, when set to true, the blocklist client will reject an address if there's an internal error processing it, and when it's set to false it will always approve on an error. Default behavior should be a rejection.

1.1 Context & Purpose

PR raised this issue: #812

2. Technical Details:

2.1 Acceptance Criteria:

• Add requested parameter
• Add tests for the new code