Bad block failed

There was a bad block reported by besu, but it returned a `404` when trying to fetch it

log, probably related:
```
Nov 17 21:48:42 mon04.ethdevops.io nodemon WARN [11-17|20:48:42.057] Failed to write file error="open www/badblocks/0x686c9c3c2a0a1664933e637a23459528aae1107fff5d0cb5cd58b40ce9b60e65.json: no such file or directory"
```

Start by tracing the bad-block fetch and file-writing paths associated with www/badblocks/ and the logged missing-directory error. Reproduce the 404 scenario if possible, then confirm the intended handling and verify that bad-block reporting no longer fails when writing the JSON file.

Written by the indexing model from the issue text.