The cli command checks for missing blocks from 0

[ankitchiplunkar]

Describe the bug The cli command scrape_block_range checks for missing blocks from block 0 even when a start_block_number is being provided.

Expected behavior The command should check for missing blocks from the start_block_number and not block 0.

Additional context First encountered at issue: https://github.com/analyseether/ether_sql/issues/60