Advanced Dev Mode

[zupzup]

Additional ideas:
It would be great to inspect the DB at development time
Add an endpoint "dump_db_as_json" that dumps the whole DB structure as JSON
Could be resued for local backup (we'd just need to encrypt it)
It would be great to inspect incoming and outgoing Nostr messages in cleartext/decrypted JSON
I guess we could just use debug logging for this, which can be set
Something like a "core dump" option (including some of the above) if something goes wrong would be good for working with support issues