test: e2e block ingestion publishing

[georgi-l95]

Description

This PR adds new test suite, responsible for testing block ingestion and publishing.

Related Issues

• Closes Test Suite - Block Ingestion & Publishing #80

Changes

Please provide a summary of the changes in this pull request.

• [Service Name]: Brief description of change.
• [File Name]: Brief description of change.

---

Reviewer Checklist

• The code follows the project's coding standards.
• New and existing unit tests pass locally with my changes.
• I have added necessary documentation (if applicable).
• I have confirmed that this change does not introduce any new security vulnerabilities.