Verify and re-import corrupted blocks in database

[trinhdn97]

Type of change

• [X] Add configurable block verification scheme and process timers (for listener, backfill, verifier) from .env variables
• [X] Implement upsert block flow in database (currently delete block header + transactions of block and then re-import)
• [X] Add corresponding average metrics for upserting block
• [X] Clean code and some terminal logs
• [X] Add unit tests in info_test.go and redis_test.go
• [X] Fix default paging option from page = 1 to page = 0
• [X] Add some database indices

Checklist:

• [X] My code follows the style guidelines of this project
• [X] I have performed a self-review of my own code
• [X] I have commented my code, particularly in hard-to-understand areas
• [X] I have added tests that prove my fix is effective or that my feature works
• [X] New and existing unit tests pass locally with my changes